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Publications:

Complete listing

Kvitko, B.H., Ramos, A.R., Morello, J.E., Oh, H.-S., and Collmer, A. 2007. Identification of harpins in Pseudomonas syringae pv. tomato DC3000, which are functionally similar to HrpK1 in promoting translocation of type III secretion system effectors. J. Bacteriol. 189:8059-8072. Pubmed.

Oh, H.-S., Kvitko, B.H., Morello, J.E., and Collmer, A. 2007. Pseudomonas syringae lytic transglycosylases co-regulated with the type III secretion system contribute to the translocation of effector proteins into plant cells. J. Bacteriol. 189:8277-8299. Pubmed

Collmer, A., and Gold, S. 2007. Noel T. Keen - Pioneer Leader in Molecular Plant Pathology. Annu. Rev. Phytopathol. 45:25-42. Pubmed.

Ramos, A.R., Morello, J.E., Ravindran, S., Deng, W.-L., Huang, H.-C., and Collmer, A. 2007. Identification of Pseudomonas syringae pv. syringae 61 type III secretion system Hrp proteins that can travel the type III pathway and contribute to the translocation of effector proteins into plant cells. J. Bacteriol. 189:5773-5778. Pubmed.

Wei, C.-F., Kvitko, B.H., Shimizu, R., Crabill, E., Alfano, J.R., Lin, N.-C., Martin, G.B., Huang, H.-C., and Collmer, A. 2007. A Pseudomonas syringae pv. tomato DC3000 mutant lacking the type III effector HopQ1-1 is able to cause disease in the model plant Nicotiana benthamiana. Plant J. 51:32-46.  Pubmed.

Badel, J.L., Shimizu, R., Oh, H.-S., and Collmer, A. (2006) A Pseudomonas syringae pv. tomato avrE1/hopM1 mutant is severely reduced in growth and lesion formation in tomato. Mol. Plant Microbe Interact. 19: 99-111. Full text article.

Joardar, V., Lindeberg, M., Jackson, R.W., Selengut, J., Dodson, R., Brinkac, L.M., Daugherty, S.C., DeBoy, R., Durkin, A.S., Giglio, M.G., Madupu, R., Nelson, W.C., Rosovitz, M.J., Sullivan, S., Haft, D.H., Creasy, T., Davidsen, T., Zafar, N., Zhou, L., Halpin, R., Holley, T., Khouri, H., Feldblyum, T., White, O., Fraser, C.M., Chatterjee, Cartinhour, S., Schneider, D.J., Mansfield, J., Collmer, A., and Buell, C.R. (2005) Whole genome sequence analysis of Pseudomonas syringae pv. phaseolicola 1448A reveals sequence divergence among pathovars in genes involved in virulence and mobile genetic elements. J. Bacteriol 187: 6488-6498. Full text article.

Oh, H.-S., and A. Collmer. 2005. Basal resistance against bacteria in Nicotiana benthamiana leaves is accompanied by reduced vascular staining and suppressed by multiple Pseudomonas syringae type III secretion system effector proteins. Plant J. 44:348-359. Full text article.

Lindeberg, M., Stavrinides, J., Chang, J. H., Alfano, J. R., Collmer, A., Dangl, J. L., Greenberg, J. T., Mansfield, J. W., and Guttman, D. S. 2005. Proposed guidelines for a unified nomenclature and phylogenetic analysis of type III Hop effector proteins in the plant pathogen Pseudomonas syringae. Mol. Plant-Microbe Interact. 54:353-365. Abstract or Pdf.

Joardar, V., M. Lindeberg, D. J. Schneider, A. Collmer, and C. R. Buell. 2005. Lineage specific regions in Pseudomonas syringae pv tomato DC3000. Mol. Plant Pathol. 6:53-64. Abstract or Full text article.

López-Solanilla, E., P. A. Bronstein, A. R. Schneider, and A. Collmer. 2004. HopPtoN is a Pseudomonas syringae Hrp (type III secretion system) cyseine protease effector that suppresses pathogen-induced necrosis associated with both compatible and incompatible plant interactions. Mol. Microbiol. 54:353-365. Abstract or Full text article.

Schechter, L. M., Roberts, K. A., Jamir, Y., Alfano, J. R., and Collmer, A. 2004. Pseudomonas syringae type III secretion system targeting signals and novel effectors studied with a Cya translocation reporter. J. Bacteriol. 186:543-555. Abstract or Pdf.

D'Ascenzo, M. D., A. R. Collmer, and G. B. Martin (2004). PeerGAD: A peer-review-based and community-centric Web application for viewing and annotating prokaryotic genome sequences. Nucleic Acids Research, 32:3124-3135. Abstract or Pdf.
Buell CR, Joardar V, Lindeberg M, Selengut J, Paulsen IT, Gwinn ML, Dodson RJ, Deboy RT, Durkin AS, Kolonay JF, Madupu R, Daugherty S, Brinkac L, Beanan MJ, Haft DH, Nelson WC, Davidsen T, Zafar N, Zhou L, Liu J, Yuan Q, Khouri H, Fedorova N, Tran B, Russell D, Berry K, Utterback T, Van Aken SE, Feldblyum TV, D'Ascenzo M, Deng WL, Ramos AR, Alfano JR, Cartinhour S, Chatterjee AK, Delaney TP, Lazarowitz SG, Martin GB, Schneider DJ, Tang X, Bender CL, White O, Fraser CM, Collmer A. (2003). The complete genome sequence of the Arabidopsis and tomato pathogen Pseudomonas syringae pv. tomato DC3000.  Proc Natl Acad Sci U S A. 100: 10181-10186 (Sept). Pubmed or pdf.

Badel, J. L., Nomura, K., Bandyopadhyay, S., Shimizu, R., Collmer, A., and He, S. Y. 2003. Pseudomonas syringae pv. tomato DC3000 HopPtoM (CEL ORF3) is important for lesion formation but not growth in tomato and is secreted and translocated by the Hrp type III secretion system in a chaperone-dependent manner. Mol. Microbiol. 49:1239-1251. Journal article pdf or Pubmed.

Deng, W.-L., Rehm, A., Charkowski, A., Rojas, C. M., and Collmer, A. 2003. Pseudomonas syringae exchangeable effector loci: sequence diversity in representative pathovars and virulence function in P. syringae pv. syringae B728a. J. Bacteriology 185:2592-2602. Journal article pdf or Pubmed.

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Fouts, D. E., Badel, J. L., Ramos, A. R., Rapp, R. A., and Collmer, A. 2003. A Pseudomonas syringae pv. tomato DC3000 Hrp (type III secretion) deletion mutant expressing the Hrp system of bean pathogen P. syringae pv. syringae 61 retains normal host specificity for tomato. Mol. Plant-Microbe Interact. 16:43-52.  Journal article pdf or Pubmed.

Rojas, C. M., Ham, J. H., Deng, W.-L., Doyl, J. J., and Collmer, A. 2002. HecA, a member of a class of adhesins produced by diverse pathogenic bacteria, contributes to the attachment, aggregation, epidermal cell killing, and virulence phenotypes of Erwinia chrysanthemi EC16 on Nicotiana clevelandii seedlings. Proc. Natl. Acad. Sci. U S A 99:13142-13147.    Journal article pdf or Pubmed.

Badel, J. L., Charkowski, A. O., Deng, W.-L., and Collmer, A. 2002. A gene in the Pseudomonas syringae pv. tomato Hrp pathogenicity island conserved effector locus, hopPtoA1, contributes to efficient formation of bacterial colonies in planta and is duplicated elsewhere in the genome. Mol. Plant-Microbe Interact. 15:1014-1024.  Journal article pdf or Pubmed.

Collmer, A., Lindeberg, M., Petnicki-Ocwieja, T., Schneider, D. J., and Alfano, J. R. 2002. Genomic mining type III secretion system effectors in Pseudomonas syringae yields new picks for all TTSS prospectors. Trends in Microbiol. 10:462-469. Journal article pdf or Pubmed.


Petnicki-Ocwieja, T., Schneider, D. J., Tam, V. C., Chancey, S. T., Shan, L., Jamir, Y., Schechter, L. M., Buell, C. R., Tang, X., Collmer, A., and Alfano, J. R. 2002. Genomewide identification of proteins secreted by the Hrp type III protein secretion system of Pseudomonas syringae pv. tomato DC3000. Proc. Natl. Acad. Sci. USA 99:7652-7657. Journal article pdf or Pubmed.

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Fouts, D. E., Abramovitch, R. B., Alfano, J. R., Baldo, A. M., Buell, C. R., Cartinhour, S., Chatterjee, A. K., D'Ascenzo, M., Gwinn, M. L., Lazarowitz, S. G., Lin, N.-C., Martin, G. B., Rehm, A. H., Schneider, D. J., van Dijk, K., Tang, X., and Collmer, A. 2002. Genomewide identification of Pseudomonas syringae pv. tomato DC3000 promoters controlled by the HrpL alternative sigma factor. Proc. Natl. Acad. Sci. USA 99:2275-2280. Journal article pdf or Pubmed.

Collmer, A., A. O. Charkowski, W.-L. Deng, D. E. Fouts, J. H. Ham, A. H. Rehm, K. van Dijk, and J. R. Alfano. 2001. Bacterial avr proteins: secreted agents of parasitism and elicitors of plant defense, p. 36-45. In N. T. Keen, S. Mayama, J. E. Leach, and S. Tsuyumu (ed.), Delivery and Perception of Pathogen Signals in Plants. APS Press, St. Paul.

Alfano, J. R., and A. Collmer. 2001. Mechanisms of bacterial pathogenesis in plants: Familiar foes in a foreign kingdom. E. A. Groisman (ed.), Principles of Bacterial Pathogenesis. Academic Press, San Diego.

López-Solanilla, E., A. Llama-Palacios, A. Collmer, F. García-Olmedo, and P. Rodríguez-Palenzuela. 2001. Relative effects on virulence of mutations in the sap, pel and hrp loci of Erwinia chrysanthemi. Mol. Plant-Microbe Interact. 14:386-393.  Journal article pdf or Pubmed.

Collmer, A., J. R. Alfano, D. M. Anderson, J. L. Badel, W.-L. Deng, D. E. Fouts, A. H. Rehm, C. M. Rojas, O. Schneewind, and K. van Dijk. 2000. Hrp (type III) protein secretion and the virulence of Pseudomonas syringae and Erwinia chrysanthemi, p. 65-70. In P. J. G. M. de Wit, T. Bisseling, and W. Stiekema (ed.), Biology of Plant-Microbe Interactions, vol. 2. International Society for Molecular Plant-Microbe Interactions, St. Paul.

Peñaloza-Vázquez, A., G. M. Preston, A. Collmer, and C. L. Bender. 2000. Regulatory interactions between the Hrp type III protein secretion system and coronatine biosynthesis in Pseudomonas syringae pv. tomato DC3000. Microbiology Journal article pdf or Pubmed.

Collmer, A., J. L. Badel, A. O. Charkowski, W.-L. Deng, D. E. Fouts, A. R. Ramos, A. H. Rehm, D. M. Anderson, O. Schneewind, K. van Dijk, and J. R. Alfano. 2000. Pseudomonas syringae Hrp type III secretion system and effector proteins. Proc. Natl. Acad. Sci. USA 97:8770-8777. Journal article pdf or Pubmed.

Alfano, J. R., A. O. Charkowski, W.-L. Deng, J. L. Badel, T. Petnicki-Ocwieja, K. van Dijk, and A. Collmer. 2000. The Pseudomonas syringae Hrp pathogenicity island has a tripartite mosaic structure composed of a cluster of type III secretion genes bounded by exchangeable effector and conserved effector loci that contribute to parasitic fitness and pathogenicity in plants. Proc. Natl. Acad. Sci. USA 97:4856-4861. Journal article pdf or Pubmed.

Wei, W., A. Plovanich-Jones, W.-L. Deng, A. Collmer, H.-C. Huang, and S. Y. He. 2000. The gene coding for the Hrp pilus structural protein is required for type III secretion of Hrp and Avr proteins in Pseudomonas syringae pv. tomato. Proc. Natl. Acad. Sci. USA 97:2247-2252. Journal article pdf  or Pubmed.

Carrington, J. C., T. Bisseling, A. Collmer, and J. D. Jones. 1999. Highlights from the Ninth International Congress on Molecular Plant- Microbe Interactions. Plant Cell 11:2063-2069. Journal article pdf or Pubmed.

Anderson, D. M., D. E. Fouts, A. Collmer, and O. Schneewind. 1999. Reciprocal secretion of proteins by the bacterial type III machines of plant and animal pathogens suggests universal recognition of mRNA targeting signals. Proc. Natl. Acad. Sci. USA 96:12839-12843.   Journal article pdf or Pubmed.

van Dijk, K., D. E. Fouts, A. H. Rehm, A. R. Hill, A. Collmer, and J. R. Alfano. 1999. The Avr (effector) proteins HrmA (HopPsyA) and AvrPto are secreted in culture from Pseudomonas syringae pathovars via the Hrp (type III) protein secretion system in a temperature- and pH-sensitive manner. J. Bacteriol. 181:4790-4797.   Journal article pdf or Pubmed.

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Hirano, S., A. O. Charkowski, A. Collmer, D. K. Willis, and C. D. Upper. 1999. Role of the Hrp type III protein secretion system in growth of Pseudomonas syringae pv. syringae B728a on host plants in the field. Proc. Natl. Acad. Sci. USA 96:9851-9856. Journal article pdf or Pubmed.

Galán, J. E., and A. Collmer. 1999. Type III secretion machines: ingenious bacterial devices for protein delivery into host cells. Science 284:1322-1328. Journal article pdf or Pubmed.

Collmer, A., and S. V. Beer. 1998. hrp genes and their function, p. 139-148. In P. Williams, G. Salmond, and J. Ketley (ed.), Methods in Microbiology, Vol. 27: Bacterial Pathogenesis. Academic Press, New York.

Kim, J. F., A. O. Charkowski, J. R. Alfano, A. Collmer, and S. V. Beer. 1998. Transposable elements and bacteriophage sequences flanking Pseudomonas syringae avirulence genes. Mol. Plant-Microbe Interact. 11:1247-1252.  Journal article pdf.

Collmer, A. 1998. Determinants of pathogenicity and avirulence in plant pathogenic bacteria. Curr. Opinion Plant Biol. 1:329-335. Pubmed.

Preston, G., W.-L. Deng, H.-C. Huang, and A. Collmer. 1998. Negative regulation of hrp genes in Pseudomonas syringae by HrpV. J. Bacteriol. 180:4532-4537. Journal article pdf or Pubmed.

Deng, W.-L., G. Preston, A. Collmer, C.-J. Chang, and H.-C. Huang. 1998. Characterization of the hrpC and hrpRS operons of Pseudomonas syringae pathovars syringae, tomato, and glycinea and analysis of the ability of hrpF, hrpG, hrcC, hrpT, and hrpV  mutants to elicit the hypersensitive response and disease in plants. J. Bacteriol. 180:4523-4531. Journal article pdf or Pubmed.

Charkowski, A. O., J. R. Alfano, G. Preston, J. Yuan, S. Y. He, and A. Collmer. 1998. The Pseudomonas syringae pv. tomato HrpW protein has domains similar to harpins and pectate lyases and can elicit the plant hypersensitive response and bind to pectate. J. Bacteriol. 180:5211-5217 Journal article pdf or Pubmed.

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Ham, J. H., D. W. Bauer, D. E. Fouts, and A. Collmer. 1998. A cloned Erwinia chrysanthemi Hrp (type III protein secretion) system functions in Escherichia coli to deliver Pseudomonas syringae Avr signals to plant cells and to secrete Avr proteins in culture. Proc. Natl. Acad. Sci. USA 95:10206-10211. Journal article pdf or Pubmed.

Kim, J. F., J. H. Ham, D. W. Bauer, A. Collmer, and S. V. Beer. 1998. The hrpC and hrpN operons of Erwinia chrysanthemi EC16 are flanked by plcA homologs of hemolysin/adhesin genes and accompanying activator/transporter genes. Mol. Plant-Microbe Interact. 11:563-567. Journal article pdf or Pubmed.

Lindeberg, M. L., C. M. Boyd, N. T. Keen, and A. Collmer. 1998. External Loops at the C-terminus of Erwinia chrysanthemi Pectate Lyase C Are Required for Species-specific Secretion through the Out Type II Pathway. J. Bacteriol. 180:1431-1437. Journal article pdf or Pubmed.

Bogdanove, A. J., J. F. Kim, Z. Wei, P. Kolchinsky, A. O. Charkowski, A. K. Conlin, A. Collmer, and S. V. Beer. 1998. Homology and functional similarity of a hrp-linked pathogenicity operon, dspEF, of Erwinia amylovora and the avrE locus of Pseudomonas syringae pathovar tomato. Proc. Natl. Acad. Sci. USA 95:1325-1330. Journal article pdf or Pubmed.

Alfano, J. R., and A. Collmer. 1997. The type III (Hrp) secretion pathway of plant pathogenic bacteria: trafficking harpins, Avr proteins, and death. J. Bacteriol. 179:5655-5662.  Journal article pdf or Pubmed.

Charkowski, A. O., H.-C. Huang, and A. Collmer. 1997. Altered localization of the HrpZ harpin in Pseudomonas syringae pv. syringae hrp mutants suggests that different components of the type III secretion pathway control secretion across the inner and outer membranes of gram-negative bacteria. J. Bacteriol. 179:3866-3874. Journal article pdf or Pubmed.

Alfano, J. R., H.-S. Kim, T. P. Delaney, and A. Collmer. 1997. Evidence that the Pseudomonas syringae pv. syringae hrp-linked hrmA gene encodes an Avr-like protein that acts in a hrp-dependent manner within tobacco cells. Mol. Plant-Microbe Interact. 10:580-588. Journal article pdf or Pubmed.

Bauer, D. W., and A. Collmer. 1997. Molecular cloning, characterization, and mutagenesis of a pel gene from Pseudomonas syringae pv. lachrymans encoding a member of the Erwinia chrysanthemi PelADE family of pectate lyases. Mol. Plant-Microbe Interact. 10:369-379.  Journal article pdf Pubmed.

Herlache, T. C., A. T. Hotchkiss, Jr., T. J. Burr, and A. Collmer. 1997. Characterization of the Agrobacterium vitis pehA gene and comparison of the encoded polygalacturonase with the homologous enzymes from Erwinia carotovora and Ralstonia solanacearum. Appl. Environ. Microbiol. 63:338-346. Journal article pdf or Pubmed.

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Collmer, A., D. W. Bauer, J. R. Alfano, G. Preston, A. O. Loniello, and T. M. Milos. 1996. Extracellular proteins as determinants of pathogenicity in Pseudomonas syringae, p. 325-332. In K. Rudolf, T. J. Burr, J. W. Mansfield, D. Stead, A. Vivian, and J. Von Kietzell (ed.), Developments in Plant Pathology, Vol. 9: Pseudomonas syringae Pathovars and Related Pathogens. Kluwer Academic Publishers, Dordrecht, The Netherlands.

Collmer, A., J. R. Alfano, D. W. Bauer, G. M. Preston, A. O. Loniello, A. Conlin, J. H. Ham, H.-C. Huang, S. Gopalan, and S. Y. He. 1996. Secreted proteins, secretion pathways, and the plant pathogenicity of Erwinia chrysanthemi and Pseudomonas syringae, p. 159-164. In G. Stacey, B. Mullin, and P. M. Gresshoff (ed.), Advances in Molecular Genetics of Plant-Microbe Interactions, Vol. 4. APS Press, St. Paul.

Alfano, J. R., and A. Collmer. 1996. Bacterial pathogens in plants: Life up against the wall. Plant Cell 8:1683-1698.   Journal article pdf or Pubmed.

Collmer, A. 1996. Bacterial avirulence proteins: where's the action? Trends Plant Sci. 1:209-210.  Journal article pdf.

Gopalan, S., D. W. Bauer, J. R. Alfano, A. O. Loniello, S. Y. He, and A. Collmer. 1996. Expression of the Pseudomonas syringae avirulence protein AvrB in plant cells alleviates its dependence on the hypersensitive response and pathogenicity (Hrp) secretion system in eliciting genotype-specific hypersensitive cell death. Plant Cell 8:1095-1105.  Journal article pdf or Pubmed.

Lindeberg, M., G. P. C. Salmond, and A. Collmer. 1996. Complementation of deletion mutations in a cloned functional cluster of Erwinia chrysanthemi out genes with Erwinia carotovora out homologs reveals OutC and OutD as candidate gatekeepers of species-specific secretion of proteins via the type II pathway. Mol. Microbiol. 20:175-190. Pubmed.

Alfano, J. R., D. W. Bauer, T. M. Milos, and A. Collmer. 1996. Analysis of the role of the Pseudomonas syringae pv. syringae HrpZ harpin in elicitation of the hypersensitive response in tobacco using functionally nonpolar deletion mutations, truncated HrpZ fragments, and hrmA mutations. Mol. Microbiol. 19:715-728. Pubmed.

Preston, G., H.‑C. Huang, S. Y. He, and A. Collmer. 1995. The HrpZ proteins of Pseudomonas syringae pvs. syringae, glycinea, and tomato are encoded by an operon containing Yersinia ysc homologs and elicit the hypersensitive response in tomato but not soybean. Mol. Plant‑Microbe Interact. 8:717-732. Journal article pdf or Pubmed.

Huang, H.‑C., R.‑W. Lin, C.‑J. Chang, A. Collmer, and W.‑L. Deng. 1995. The complete hrp gene cluster of Pseudomonas syringae pv. syringae 61 includes two blocks of genes required for harpinPss secretion that are arranged colinearly with Yersinia ysc homologs. Mol. Plant‑Microbe Interact. 8:733-746. Journal article pdf or Pubmed.

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Alfano, J. R., J. H. Ham, and A. Collmer. 1995. Use of Tn5tac1 to clone a pel gene encoding a highly alkaline, asparagine‑rich pectate lyase isozyme from an Erwinia chrysanthemi mutant with deletions affecting the major pectate lyase isozymes. J. Bacteriol. 177:4553‑4556. Journal article pdf or Pubmed.

Bauer, D. W., Z.-M. Wei, S. V. Beer, and A. Collmer. 1995. Erwinia chrysanthemi harpinEch: an elicitor of the hypersensitive response that contributes to soft-rot pathogenesis. Mol. Plant-Microbe Interact. 8:484-491. Pubmed.

Collmer, A., D. W. Bauer, J. R. Alfano, G. Preston, A. O. Loniello, H. -C. Huang, and S. Y. He. 1994. The role of Pseudomonas syringae and Erwinia chrysanthemi hrp gene products in plant interactions. In M. J. Daniels (ed.), Advances in Molecular Genetics of Plant-Microbe Interactions, Vol. 3. Kluwer Academic Publishers, Dordrecht, pp. 49-56.

Collmer, A. and D. W. Bauer. 1994. Erwinia chrysanthemi and Pseudomonas syringae: trafficking in extracellular virulence proteins. In: Current Topics in Microbiology and Immunology, Vol. 192: Bacterial Pathogenesis of Plants and Animals - Molecular and Cellular Mechanisms. J. L. Dangl (ed.), Springer-Verlag, Berlin, pp. 43-78. 

Collmer, A., S. Kelemu, and D. W. Bauer. 1994. Molecular biology of pathogenicity in Erwinia chrysanthemi EC16. In: Bacterial Pathogenesis and Disease Resistance: Proceedings of the Fourth International Symposium on Biotechnology and Plant Protection. D. D. Bills and S.-D. Kung, eds. World Scientific, Singapore, pp. 73-84.

Bauer, D. W., A. J. Bogdanove, S. V. Beer, and A. Collmer. 1994. Erwinia chrysanthemi hrp genes and their involvement in soft rot pathogenesis and elicitation of the hypersensitive response. Mol. Plant-Microbe Interact. 7:573-581. Pubmed.

He, S. Y., D. W. Bauer, A. Collmer, and S. V. Beer. 1994. The hypersensitive response elicited by Erwinia amylovora requires active plant metabolism. Molec. Plant-Microbe Interact. 7:289-292. 

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He, S. Y., M. Lindeberg, and A. Collmer. 1993. Protein secretion by plant pathogenic bacteria. In: Biotechnology in Plant Disease Control. I. Chet (ed.), Wiley-Liss, New York pp. 39-64.

Beer, S. V., Z.-M. Wei, R. J. Laby, S.-Y. He, D. W. Bauer, A. Collmer, and C. Zumoff. 1993. Are harpins universal elicitors of the hypersensitive response of phytopathogenic bacteria? In: E. W. Nester and D. P. S. Verma (ed.), Advances in Molecular Genetics of Plant-Microbe Interactions, Vol. 2. Kluwer Academic Publishers, Dordrecht pp. 281-286.

Drennan, J. L., A. A. G. Westra, S. A. Slack, L. M. Delserone, A. Collmer, N. C. Gudmestad, and A. E. Oleson. 1993. Comparison of a DNA hybridization probe and an enzyme-linked immunosorbent assay for the detection of Clavibacter michiganensis subsp. sepedonicus in field-grown potatoes. Plant Dis. 77:1243-1247.

Huang, H.-C., Y. Xiao, R.-H. Lin, Y. Lu, S. W. Hutcheson, and A. Collmer. 1993. Characterization of the Pseudomonas syringae pv. syringae hrpJ and hrpI genes: homology of HrpI to a superfamily of proteins associated with protein translocation. Mol. Plant-Microbe Interact. 6:515-520. 

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He, S. Y., H.-C. Huang, and A. Collmer. 1993. Pseudomonas syringae pv. syringae harpinPss: a protein that is secreted via the hrp pathway and elicits the hypersensitive response in plants. Cell 73:1255-1266. Pubmed.

Kelemu, S., and A. Collmer. 1993. Erwinia chrysanthemi EC16 produces a second set of plant-inducible pectate lyase isozymes. Appl. Environ. Microbiol. 59:1756-1761. Journal abstract.

Lindeberg, M., and A. Collmer. 1992. Analysis of eight out genes in a cluster required for pectic enzyme secretion by Erwinia chrysanthemi: Sequence comparison with secretion genes from other gram-negative bacteria. J. Bacteriol. 174:7385-7397.

Wei, Z.-M., R. J. Laby, C. H. Zumoff, D. W. Bauer, S. Y. He, A. Collmer, and S. V. Beer. 1992. Harpin, elicitor of the hypersensitive response produced by the plant pathogen Erwinia amylovora. Science 257:85-88.

Huang, H.-C., S. Y. He, D. W. Bauer, and A. Collmer. 1992. The Pseudomonas syringae pv. syringae 61 hrpH product: an envelope protein required for elicitation of the hypersensitive response in plants. J. Bacteriol. 174:6878-6885.

Chatterjee, A. K., J. L. McEvoy, H. Murata, and A. Collmer. 1991. Regulation of the production of pectinases and other extracellular enzymes in the soft-rotting Erwinia spp. In: Molecular Strategies of Pathogens and Host Plants. S. S. Patil, S. Ouchi, D. Mills, and C. Vance (eds.), Springer-Verlag, New York pp. 45-58.

Collmer, A., D.W. Bauer, S.Y. He, M. Lindeberg, S. Kelemu, P. Rodriquez-Palenzuela, T.J. Burr, and A.K. Chatterjee. 1991. Pectic enzyme production and bacterial plant pathogenicity. In: Advances in Molecular Genetics of Plant?Microbe Interactions, Vol. 1. H. Hennecke and D. P. S. Verma (eds.), Kluwer Academic Publishers, Dordrecht pp. 65-72.

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Chatterjee, A. K., H. Murata, J.L. McEvoy, and A. Collmer. 1991. Molecular genetics of regulation and export of Erwinia pectinases. pp. 177-196 In: Biochemistry and Molecular Biology of Plant-Pathogen Interactions - Proceedings of the Phytochemical Society of Europe, Vol. 32, C. J. Smith (ed.), Oxford University Press, Oxford.

Brisset, M.-N., P. Rodriguez-Palenzuela, T. J. Burr, and A. Collmer. 1991. Attachment, chemotaxis, and multiplication of Agrobacterium tumefaciens biovar 1 and biovar 3 on grapevine and pea. Appl. Environ. Microbiol. 57:3178-3182.

Rodriguez-Palenzuela, P., T. J. Burr, and A. Collmer. 1991. Polygalacturonase is a virulence factor in Agrobacterium tumefaciens biovar 3. J. Bacteriol. 173:6547-6552.

Huang, H.-C., S. W. Hutcheson, and A. Collmer. 1991. Characterization of the hrp cluster from Pseudomonas syringae pv. syringae 61 and TnphoA tagging of genes encoding exported or membrane-spanning proteins. Molec. Plant-Microbe Interact. 4:469-471.

He, S. Y., C. Schoedel, A. K. Chatterjee, and A. Collmer. 1991. Extracellular secretion of pectate lyase by the Erwinia chrysanthemi Out pathway is dependent upon Sec?mediated export across the inner membrane. J. Bacteriol. 173: 4310-4317.

Murata, H., J.L. McEvoy, A. Chatterjee, A. Collmer, and A.K. Chatterjee. 1991. Molecular cloning of an aep gene that activates production of extracellular pectolytic, cellulolytic and proteolytic enzymes in Erwinia carotovora subsp. carotovora. Mol. Plant-Microb Interact. 4:239-246.

McGuire, R.G., P. Rodriguez-Palenzuela, A. Collmer, and T.J. Burr. 1991. Polygalacturonase production by Agrobacterium tumefaciens biovar 3. Appl. Environ. Microbiol. 57:660-664.

He, S.Y., M. Lindeberg, A.K. Chatterjee, and A. Collmer. 1991. Cloned Erwinia chrysanthemi out genes enable Escherichia coli to selectively secrete a diverse family of heterologous proteins to its milieu. Proc. Nat. Acad. Sci. USA 88:1079-1083.

He, S.Y. and A. Collmer. 1990. Molecular cloning, nucleotide sequence, and marker-exchange mutagenesis of the exo-poly-a-D-galacturonosidase-encoding pehX gene of Erwinia chrysanthemi EC16. J. Bacteriol 172:4988-4995.

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Brooks, A., S. Gold, N.T. Keen, S.Y. He, A. Collmer, and S.W. Hutcheson. 1990. Molecular characterization of the structural gene for exopolygalacturonate lyase from Erwinia chrysanthemi EC16 and characterization of the enzyme product. J. Bacteriol. 172:6950-6958.

Murata, H., M. Fons, A. Chatterjee, A. Collmer, and A.K. Chatterjee. 1990. Characterization of transposon insertion Out- mutants of Erwinia carotovora subsp. carotovora defective in enzyme export and a DNA segment that complements out mutations in E. carotovora subsp. carotovora, E. carotovora subsp. atroseptica and E. chrysanthemi. J. Bacteriol. 172:2970-2978.

Hutcheson, S.W., A. Collmer, and C.J. Baker. 1989. Elicitation of the hypersensitive response by Pseudomonas syringae. Physiol. Plant. 76:155-163.

Collmer, A., J.L. Ried, G.L. Cleveland, S.Y. He, and A.D. Brooks. 1988. Mutational analysis of the role of pectic enzymes in the virulence of Erwinia chrysanthemi. In: Molecular Biology of Plant-Pathogen Interactions: UCLA Symposia on Molecular and Cellular Biology, New Series, Vol. 101. B. Staskawicz, P. Ahlquist, and O. Yoder (eds.), Alan R. Liss, Inc., New York. pp. 35-48.

Collmer, A., J.L. Ried, A.D. Brooks, and S.Y. He. 1988. Pectic enzyme production and Erwinia chrysanthemi pathogenicity. In: Physiology and Biochemistry of Plant-Microbial Interactions. N. T. Keen, T. Kosuge, and L.L. Walling (eds.), Waverly Press, Inc., Baltimore. pp. 76-82.

Collmer, A., A.D. Brooks, S.Y. He, and G.L. Cleveland. 1988. Construction and characterization of Erwinia chrysanthemi mutants containing mutations in genes encoding extracellular pectic enzymes. In: Molecular Genetics of Plant-Microbe Interactions 1988. R. Palacios and D.P.S. Verma (eds.), APS Press, St. Paul. pp. 356-361.

Collmer, A., J.L. Ried, and M.S. Mount. 1988. Assay methods for pectic enzymes. Meth. Enzymol. 161:329-335.

Ried, J.L. and A. Collmer. 1988. Construction and characterization of an Erwinia chrysanthemi mutant with directed deletions in all of the pectate lyase structural genes. Molec. Plant Microbe Interactions 1:32-38.

Huang, H.C., R. Schuurink, T.P. Denny, M.M. Atkinson, C.J. Baker, I. Yucel, S.W. Hutcheson, and A. Collmer. 1988. Molecular cloning of a Pseudomonas syringae pv syringae gene cluster that enables Pseudomonas fluorescens to elicit the hypersensitive response in tobacco. J. Bacteriol. 170:4748-4756.

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Civerolo, E.L., A. Collmer, R.E. Davis, and A.G. Gillaspie (eds.). 1987. Proceedings of the Sixth International Conference on Plant Pathogenic Bacteria, College Park, Maryland, 1985. Martinus Nijhoff, Dordrecht. 1055 pp.

Roeder, D.L., and A. Collmer. 1987. Marker-exchange mutagenesis of the pelB gene in Erwinia chrysanthemi CUCPB 1237. In: Proceedings of the Sixth International Conference on Plant Pathogenic Bacteria, June 2-6, 1985, College Park, Maryland. E.L. Civerolo, A. Collmer, A.G. Gillaspie and R.E. Davis (eds.), Martinus Nijhoff, Dordrecht pp. 218-223.

Ried, J.L. and A. Collmer. 1987. An npt-sacB-sacR cartridge for constructing directed, unmarked mutations in Gram- negative bacteria by marker exchange-eviction mutagenesis. Gene 57:239-246.

Payne, J.H., C. Schoedel, N.T. Keen, and A. Collmer. 1987. Multiplication and virulence in plant tissues of Escherichia coli clones producing pectate lyase isozymes PLb and PLe at high levels and of an Erwinia chrysanthemi mutant deficient in PLe. Appl. Environ. Microbiol. 53:2315- 2320.

Baker, C.J., M.M. Atkinson, and A. Collmer. 1987. Concurrent loss in Tn5 mutants of Pseudomonas syringae pv. syringae of the ability to induce the hypersensitive response and host plasma membrane K+/H+ exchange in tobacco. Phytopathology 77:1268-1272.

Collmer, A. 1986. Pectic enzymes and bacterial invasion of plants. In: Plant-Microbe Interactions - Molecular and Genetic Perspectives, Vol. 2. T. Kosuge and E.W. Nester (eds.), Macmillan Publishing Co., New York. pp. 253-284.

Collmer, A. 1986. The molecular biology of pectic enzyme production and bacterial soft rot pathogenesis. In: Biology and Molecular Biology of Plant-Pathogen Interactions. J.A. Bailey (ed.), Plenum, New York. pp. 277-289.

Collmer, A., and N.T. Keen. 1986. The role of pectic enzymes in plant pathogenesis. Annu. Rev. Phytopathol. 24:383-409.

Schoedel, C., and A. Collmer. 1986. Evidence of homology between the pectate lyase-encoding pelB and pelC genes in Erwinia chrysanthemi. J. Bacteriol. 167:117-123.

Ried, J.L., and A. Collmer. 1986. Comparison of pectic enzymes produced by Erwinia chrysanthemi, Erwinia carotovora subsp. carotovora, and Erwinia carotovora subsp. atroseptica. Appl. Environ. Microbiol. 52:305-310.

Baker, C.J., M.M. Atkinson, M.A. Roy, and A. Collmer. 1986. Inhibition of the hypersensitive response in tobacco by pectate lyase. Physiol. Mol. Plant Pathol 29:217-225.

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Atkinson, M.M., C.J. Baker, and A. Collmer. 1986. Transient activation of a plasmalemma K+ efflux and H+ influx in tobacco by a pectate lyase isozyme from Erwinia chrysanthemi. Plant Physiol. 82:142-146.

Collmer, A., C. Schoedel, D.L. Roeder, and J.L. Ried. 1985. Molecular cloning of Erwinia chrysanthemi pectate lyase isozyme genes and their expression in Escherichia coli. In: Advances in the Molecular Genetics of the Bacteria-Plant Interaction. A.A. Szalay and R.P. Legocki (eds.), Media Services, Cornell University, Ithaca, New York. pp. 159-163.

Roeder, D.L., and A. Collmer. 1985. Marker-exchange mutagenesis of a pectate lyase isozyme gene in Erwinia chrysanthemi. J. Bacteriol. 164:51-56.

Ried, J.L., and A. Collmer. 1985. An activity stain for the rapid characterization of pectic enzymes in isoelectric focusing and sodium dodecyl sulfate polyacrylamide gels. Appl. Environ. Microbiol. 50:615-622. 

Collmer, A., C. Schoedel, D.L. Roeder, J.L. Ried, and J.F. Rissler. 1985. Molecular cloning in Escherichia coli of Erwinia chrysanthemi genes encoding multiple forms of pectate lyase. J. Bacteriol. 161:913-920

Collmer, A., and D. B. Wilson. 1983. Cloning and expression of a Thermomonospora YX endocellulase gene in E. coli. Biotechnology 1:594-601.

Collmer, A., P. Berman, and M. S. Mount. 1982. Pectate lyase regulation and bacterial soft-rot pathogenesis. In: M. S. Mount and G. H. Lacy (eds.), Phytopathogenic Prokaryotes, Vol. 1. Academic Press, New York. pp 395-422.

Collmer, A., C. H. Whalen, S. V. Beer, and D. F. Bateman. 1982. An exo-poly-a-D-galacturonosidase implicated in the regulation of extracellular pectate lyase production in Erwinia chrysanthemi. J. Bacteriol. 149:626- 634.

Collmer, A., and D. F. Bateman. 1982. Regulation of extracellular pectate lyase in Erwinia chrysanthemi: evidence that reaction products of pectate lyase and exo-poly-a-D galacturonosidase mediate induction on D-galacturonan. Physiol. Plant Pathol. 21:127-139.

Collmer, A., and D. F. Bateman. 1981. Impaired induction and self-catabolite repression of extracellular pectate lyase in Erwinia chrysanthemi mutants deficient in oligogalacturonide lyase. Proc. Natl. Acad. Sci. U.S.A. 78:3920-3924.

Collmer, A., and M. Lamborg. 1976. Arrangement and regulation of the nitrogen fixation genes in Klebsiella pneumoniae. J. Bacteriol. 126:806-813.