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Understanding the Size and Function of the Nostoc punctiforme Genome

This resource provides an in-depth analysis of the genome of Nostoc punctiforme, a multicellular, symbiotic cyanobacterium. It explores the sizes of various genomes, gene families, and the relationship between genome size and function. The study aims to unveil whether larger genomes correlate with more functions and genes in this organism. By examining genetic data and family distributions, we can better understand the evolutionary biology and ecological roles of Nostoc punctiforme, particularly in photoautotrophy and symbiotic interactions.

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Understanding the Size and Function of the Nostoc punctiforme Genome

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  1. Does function explain size? Image- www.thehumanbody.ecsd.net/ the_human_body.htm Image- http://www.bio.utexas.edu/research/utex/photogallery/Nostoc_punctiforme_1629.htm

  2. Does function explain size? 3.2 billion bp 250 billion bp 137 million bp 9.1 million bp 1.7 million bp Image- www.microbialgenome.org/ primer/analysis.shtml Image- www.pestproducts.com/ fruitflyimage.htm www.voidspace.org.uk/science/genome/4.shtml Image- www.emc.maricopa.edu/.../ BioBookDiversity_5.html http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/G/GenomeSizes.html

  3. 9.1 Mb 7.8 Mb 7.1 Mb 4.7 Mb 1.7Mb Npun Tery Avar Gvi Pro9313 The Giant Images- www-cyanosite.bio.purdue.edu/ images/images.html

  4. Npun -Photosynthesis -Heterocysts (fix N2 ) -Heterotrophic (dark w/sugar) -Hormogonia -Symbiosis -Akinetes Image-http://microbiology.ucdavis.edu/meekslab/ -http://www.palmasur.com/ oferta_m.htm Meeks, J.C. et. al. 2001. An overview of the genome of Nostoc punctiforme, a multicellular, symbiotic cyanobarcterium. Photosynthesis Research 70: 85-106

  5. Functions Closest

  6. More functions---More genes? More genes? Npun-7412 Avar-6809 SS120-1928 Maybe- Or Duplicates? More families of genes? 1 1232 2 2 1 More genes in each family?

  7. Counting genes… • 0 avar_gene1088 • 0 tll0876 • 1 Pro1503 • 1 avar_gene713 • avar_gene83 • … • 20082 tsr2400 Pattern match Avar Total genes- 3

  8. Counting families… Count genes per family “0” – 1 gene “1”- 2 genes “20082” – 0 genes if count = 0 Count family Avar – 2 families 1 2 0 • 0 avar_gene1088 • 0 tll0876 • 1 Pro1503 • 1 avar_gene713 • avar_gene83 • … • 20082 tsr2400

  9. More families?

  10. Genes per family? total genes/ total families

  11. Average -Skewed? Genes per family Take median All cyano - 1

  12. Unique families?

  13. Shared families? Earlier– phylogenetic trees based on 16-S RNA difference Unique to Npun and other

  14. More families More genes per family Lots of genes in a few families Share families- shared functions?

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