November 23, 2009
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Jim Tripp
Research Interests:
Research:
I joined the Zehr Lab in July of 2008. My work prior to arriving in the Zehr lab centered around the structural and functional genomics of the abundant and cosmopolitan bacterium SAR11, which I studied in the Giovannoni Lab at Oregon State University, earning a PhD from there in 2007. With respect to functional genomics, I discovered some novel nutrient requirements of SAR11 bacteria, notably their apparent dependence on reduced sulfur compounds due to a deficiency in assimilatory sulfate reduction. With respect to structural genomics, I collaborated with others on a metagenomic project demonstrating that SAR11 bacteria maintain gene order over expanses of hundreds of genes while nucleotide sequences diverge rapidly, assisted by abnormally high rates of recombination.
At the Zehr Lab I plan to continue studying genomics and metagenomics, and to collaborate with others doing metatranscriptomics. The phylogenetic scope of my work will expand to include cyanobacteria, particularly those that fix nitrogen.
Publications:
9. Tripp HJ+, Schwalbach MS+, Meyer MM, Kitner JB, Breaker RR, Giovannoni SJ (2008). Unique glycine-activated riboswitch linked to glycine-serine auxotrophy in SAR11. Environmental Microbiology (in press). + equal contribution
8. Tripp HJ, Giovannoni SJ (2008). Plankton cell lysates supply compounds that are needed by ‘Candidatus Pelagibacter ubique’ to attain maximum cell density in seawater. Limnology and Oceanography (in review).
7. Tripp HJ, Kitner JB, Schwalbach MS, Wilhelm LJ, Giovannoni SJ (2008). SAR11 Marine Bacteria Require Exogenous Reduced Sulphur for Growth. Nature 452, 741-744.
6. Giovannoni SJ+, Hayakawa DH+, Tripp HJ+, Stingl U+, Givan SA, Cho Jang-Cheon, Oh Hyun-Myung, Kitner JB, Vergin KL, Rappé MS (2008). The Small Genome of an Abundant Coastal Ocean Methylotroph. Environmental Microbiology On-line Early: doi:10.111/j.1462-2920.2008.01598.x
5. Vergin KL, Tripp HJ, Wilhelm LJ, Denver DR, Rappé MS, Giovannoni SJ (2007). High Intraspecific Recombination in a Native Population of ‘Candidatus Pelagibacter ubique’ (SAR11). Environmental Microbiology 9 (10): 2340-2440.
4. Stingl U, Tripp HJ, Giovannoni SJ (2007). Improvements of high-throughput-culturing yielded novel SAR11 stains and other abundant marine bacteria from the Oregon coast and the Bermuda Atlantic Time series study site. The ISME Journal 1(4):361-371.
3. Wilhelm LJ, Tripp HJ, Givan SA, Smith DP, Giovannoni SJ (2007), Natural variation in SAR11 marine bacterioplankton genomes inferred from metagenomic data. Biology Direct 2(27).
2. Giovannoni SJ, Tripp HJ, Givan S, Podar M, Vergin KL, Baptista D, Bibbs L, Eads J, Richardson TH, Noordewier M, Rappe MS, Short JM, Carrington JC, Mathur EJ (2005). Genome streamlining in a cosmopolitan oceanic bacterium. Science. 309(5738):1242-5.
1. Giovannoni SJ, Bibbs L, Cho JC, Stapels MD, Desiderio R, Vergin KL, Rappe MS, Laney S, Wilhelm LJ, Tripp HJ, Mathur EJ, Barofsky DF (2005). Proteorhodopsin in the ubiquitous marine bacterium SAR11. Nature. 438(7064):82-5.
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University of California Santa Cruz Ocean Sciences Department Marine Microbiology Laboratory/Zehr Lab 1156 High Street, Santa Cruz, CA 95064 T: 831-459-3128 F: 831-459-4882 |
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