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(Cell structure and metabolism)
(Cell structure and metabolism)
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==Cell structure and metabolism==
 
==Cell structure and metabolism==
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[[File:Cell Wall GN.png|200px|thumb|left|alt text]]
  
 
==Ecology==
 
==Ecology==

Revision as of 23:54, 14 September 2016

Name Bench ID Date MICR3004

Classification

Higher order taxa

Bacteria – Bacteroidetes – Bacteroidia – Bacteroidales – Porphyromonadaceae - Porphyromonas - P. gingivalis

Species

Species: Porphyromonas gingivalis Strain: W88

Description and significance

Genome structure

The genome of strain W88 is comprised of a circular chromosome made up of 2 343 479 bp’s. On average the guanine and cytosine content make up approximately 48.3 % of the genome. The circular chromosome encodes 1909 protein genes 65 RNA genes. 4 ribosomal operons (rrn, 5S rRNA-23S rRNA-tRNAAla-tRNAIle-16S rRNA) including 53 tRNA genes showing specificity for all 20 amino acids have been documented. Interestingly the number of rrn operons and tRNA genes in strain W83 were identical to those of an avirulent strain counterpart ATCC 33277. Nonetheless the extensive rearrangement between the two strains through the introduction of mobile elements inevitably altered the virulence of the bacterium.

The genome of W83 is composed predominately (85%) of ORF. Encoding a total of 1,990 ORF, 1075 presented detectable biological roles. Of the remaining ORF, 184 were categorised as a conserved hypothetical protein or conserved domain protein, 208 had to known function, and 523 encoded hypothetical proteins.

Cell structure and metabolism

alt text

Ecology

Pathology

Application to biotechnology

Bioengineering, biotechnologically relevant enzyme/compound production, drug targets,…

Current research

Summarise some of the most recent discoveries regarding this species.

References

NOT YET LINKED TO TEXT

1. Boone D, R and Castenholtz R, W. Bergey's Manual of Systematic Bacteriology. 2nd Ed. Vol. 1. Springer-Verlag: New York; 2002.

2. Shah N, H., Collins D, M. (1988) Proposal for Reclassification of Bacteroides asaccharolyticus, Bacteroides gingivalis, and Bacteroides endodontalis in a New Genus, Porphyromonas. Int J Syst Evol Microbiol 38 :128-131.

3. Naito, M., Hirakawa, H., Yamashita, A., Ohara, N., Shoji, M., Yukitake, H., Nakayama, K., Toh, H., Yoshimura, F., Kuhara, S., Hattori, M., Hayashi, T., Nakayama, K. (2008) Determination of the genome sequence of Porphyromonas gingivalis strain ATCC 33277 and genomic comparison with strain W83 revealed extensive genome rearrangements in P. gingivalis. DNA Res 15 :215-225.

4. Ohara-Nemoto, Y., Rouf, S. M., Naito, M., Yanase, A., Tetsuo, F., Ono, T., Kobayakawa, T., Shimoyama, Y., Kimura, S., Nakayama, K., Saiki, K., Konishi, K. & Nemoto, T. K. (2014) Identification and characterization of prokaryotic dipeptidyl-peptidase 5 from Porphyromonas gingivalis. J Biol Chem, 289: 5436-48.

5. Lamont, R. J. & Jenkinson, H. F. (1998) Life below the gum line: pathogenic mechanisms of Porphyromonas gingivalis. Microbiol Mol Biol Rev, 62: 1244-63.

6. Igboin, C. O., Griffen, A. L. and Leys, E. J. (2009) Porphyromonas gingivalis strain diversity. J Clin Microbiol, 47,: 3073-81.

7. Grenier, D. and Mayrand, D. 1987. Selected characteristics of pathogenic and nonpathogenic strains of Bacteroides gingivalis. J Clin Microbiol, 25: 738-40.

8. [1]

9. [2]

11. Chatterjee. S and Chaudhuri K. (2012) Outer membrane vesicles of bacteria. SpringerBriefs in Microbiology

  • Chapter Book

12. How, K. Y., Song, K. P. and Chan, K. G. (2016) Porphyromonas gingivalis: An Overview of Periodontopathic Pathogen below the Gum Line. Front Microbiol, 7: 53.

13. Bao, K., Belibasakis, G. N., Thurnheer, T., Aduse-Opoku, J., Curtis, M. A. and Bostanci, N. (2014) Role of Porphyromonas gingivalis gingipains in multi-species biofilm formation. BMC Microbiol, 14: 258.

14. Cugini, C., Klepac-Ceraj, V., Rackaityte, E., Riggs, J. E. and Davey, M. E. (2013. Porphyromonas Gingivalis: Keeping The Pathos Out Of The Biont. J Oral Microbiol, 5.

15. Goulbourne, P. A. and Ellen, R. P. (1991) Evidence that Porphyromonas (Bacteroides) gingivalis fimbriae function in adhesion to Actinomyces viscosus. J Bacteriol, 173: 5266-74.

16. Jenkinson, H. F. and Demuth, D. R. (1997) Structure, function and immunogenicity of streptococcal antigen I/II polypeptides. Mol Microbiol, 23: 183-90.

17. Lamont, R. J., Gil, S., Demuth, D. R., Malamud, D. and Rosan, B. (1994) Molecules of Streptococcus gordonii that bind to Porphyromonas gingivalis. Microbiology, 140: 867-72.

18. Nagata, H., Murakami, Y., Inoshita, E., Shizukuishi, S. and Tsunemitsu, A. (1990) Inhibitory effect of human plasma and saliva on co-aggregation between Bacteroides gingivalis and Streptococcus mitis. J Dent Res, 69: 1476-9.

19. Lewis, J. P., Iyer, D. and Anaya-Bergman, C. (2009) Adaptation of Porphyromonas gingivalis to microaerophilic conditions involves increased consumption of formate and reduced utilization of lactate. Microbiology, 155: 3758-74.

20. K. E., Fleischmann, R. D., Deboy, R. T., Paulsen, I. T., Fouts, D. E., Eisen, J. A., Daugherty, S. C., Dodson, R. J., Durkin, A. S., Gwinn, M., Haft, D. H., Kolonay, J. F., Nelson, W. C., Mason, T., Tallon, L., Gray, J., Granger, D., Tettelin, H., Dong, H., Galvin, J. L., Duncan, M. J., Dewhirst, F. E. and Fraser, C. M. (2003) Complete genome sequence of the oral pathogenic Bacterium porphyromonas gingivalis strain W83. J Bacteriol, 185: 5591-601.

21. Mysak, J., Podzimek, S., Sommerova, P., Lyuya-Mi, Y., Bartova, J., Janatova, T., Prochazkova, J. and Duskova, J. (2014) Porphyromonas gingivalis: major periodontopathic pathogen overview. J Immunol Res, 2014: 476068.








This page is written by Amy Pham for the MICR3004 course, Semester 2, 2016