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===Higher order taxa:===
===Higher order taxa:===


Archaea; Euryarchaeota; Methanococci; Methanococcales; Methanocaldococcaceae; Methanococcus; ''Methanococcus maripaludis''
Archaea; Euryarchaeota; Methanococci; Methanococcales; Methanocaldococcaceae; Methanococcus; Maripaludis
 
===Kingdom===
Archaea


===Species:===
===Species:===
''Methanococcus maripaludis''
{|
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'''NCBI: [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=2190 Taxonomy] [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=genome&cmd=Retrieve&dopt=Overview&list_uids=10928 Genome]'''
'''NCBI: [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=39152&lvl=3&lin=f&keep=1&srchmode=1&unlock Taxonomy] [http://www.ncbi.nlm.nih.gov/sites/entrez?db=genome&cmd=Retrieve&dopt=Overview&list_uids=394 Genome]'''
|}
|}
Genus: Methanococcus
Species: Maripaludis


==Description and significance==
==Description and significance==
The species ''Methanococcus maripaludis'' is a member of the third branch of life, Archaea.  More specifically, it is a member of the methanogenic archaea.  This means that this species is a methane producer and it does so by anaerobic processes, utilizing h2 as an electron donor for co2 reduction to methane.
The species ''Methanococcus maripaludis'' is a member of the kingdom Archaea.  More specifically, it is a member of the methanogenic archaea.  “Methanogens are obligate anaerobes that carry out the reduction of carbon dioxide to methane using molecular hydrogen as the reductant” (1). This means that this species undergoes anaerobic metabolic processes with the final product being methane, utilizing H2 as an electron donor for CO2 reduction to methane.
''Methanococcous maripaludis'' is a significant microbe because of its excellent laboratory growth behavior.  This anaerobic archaea is helpful in “development of methods for growth on solid medium, enriching auxotrophic mutants, efficient transformation, and random insertional inactivation of genes. It is because of these improvements to laboratory techniques that ''Methanococcus maripaludis'' is a popular microbe for genetic manipulation.
 
''Methanococcous maripaludis'' is a significant microbe because of its excellent laboratory growth behavior.  This anaerobic archaea is helpful in “development of methods for growth on solid medium, enriching auxotrophic mutants, efficient transformation, and random insertional inactivation of genes” (2).  It is because of these improvements to laboratory techniques that ''Methanococcus maripaludis'' is a popular archaebacteria for genetic manipulation.
 
==Genome structure==
The genome of ''Methanococcus maripaludis'' is similar to the genome of the more common ''Methanococcus jannaschii'', with the difference being that ''Methanococcus maripaludis'' lacks inteins.  It contains a circular genome of 1.66Mb in length, with no extra-chromosomal elements.  . This chromosome also contains 1,722 protein-coding genes and has a 33% Guanine-Cytosine content (GC content) (3).
 
==Cell structure and metabolism==
 
==Ecology==
“Methane formation occurs only under strictly anaerobic conditions” (5).  Because of this, methanogenesis occurs only in environments that are anoxic, meaning environments that are abnormally low in or lacking oxygen.  ''Methanococcus'' is commonly found in geothermal habitats such as thermal vents.  ''Methanococcus maripaludis'' is found in salt-marsh sediment on the southeastern coast of the United States.
 
==Current research==
 
==References==
1. Dawes, Edwin. Microbial Engergetics. New York: Blackie. 1986
 
 
2. Whitman et al. 1997. Development of genetic approaches for the methane-producing areabacterium Methanococcus maripaluis. Biofactors, Volume 6, Number 1: 37-46. http://www.ingentaconnect.com/content/ios/bio/1997/00000006/00000001/bio29;jsessionid=3ko9jad5p7srd.alice?format=print
 
3. John Leigh Lab. University of Washington Department of Microbiology. http://faculty.washington.edu/leighj/mm.html
 
4. Moat et al. Microbial Physiology, 4th edition. New York: Wiley-Liss. 2002
 
5. Brock et al. Biology of Microorganisms, 7th edition.  New Jersey. 1994

Latest revision as of 01:34, 28 August 2007

Methanococcus maripaludis

Classification

Higher order taxa:

Archaea; Euryarchaeota; Methanococci; Methanococcales; Methanocaldococcaceae; Methanococcus; Maripaludis

Species:

NCBI: Taxonomy Genome

Genus: Methanococcus

Species: Maripaludis

Description and significance

The species Methanococcus maripaludis is a member of the kingdom Archaea. More specifically, it is a member of the methanogenic archaea. “Methanogens are obligate anaerobes that carry out the reduction of carbon dioxide to methane using molecular hydrogen as the reductant” (1). This means that this species undergoes anaerobic metabolic processes with the final product being methane, utilizing H2 as an electron donor for CO2 reduction to methane.

Methanococcous maripaludis is a significant microbe because of its excellent laboratory growth behavior. This anaerobic archaea is helpful in “development of methods for growth on solid medium, enriching auxotrophic mutants, efficient transformation, and random insertional inactivation of genes” (2). It is because of these improvements to laboratory techniques that Methanococcus maripaludis is a popular archaebacteria for genetic manipulation.

Genome structure

The genome of Methanococcus maripaludis is similar to the genome of the more common Methanococcus jannaschii, with the difference being that Methanococcus maripaludis lacks inteins. It contains a circular genome of 1.66Mb in length, with no extra-chromosomal elements. . This chromosome also contains 1,722 protein-coding genes and has a 33% Guanine-Cytosine content (GC content) (3).

Cell structure and metabolism

Ecology

“Methane formation occurs only under strictly anaerobic conditions” (5). Because of this, methanogenesis occurs only in environments that are anoxic, meaning environments that are abnormally low in or lacking oxygen. Methanococcus is commonly found in geothermal habitats such as thermal vents. Methanococcus maripaludis is found in salt-marsh sediment on the southeastern coast of the United States.

Current research

References

1. Dawes, Edwin. Microbial Engergetics. New York: Blackie. 1986


2. Whitman et al. 1997. Development of genetic approaches for the methane-producing areabacterium Methanococcus maripaluis. Biofactors, Volume 6, Number 1: 37-46. http://www.ingentaconnect.com/content/ios/bio/1997/00000006/00000001/bio29;jsessionid=3ko9jad5p7srd.alice?format=print

3. John Leigh Lab. University of Washington Department of Microbiology. http://faculty.washington.edu/leighj/mm.html

4. Moat et al. Microbial Physiology, 4th edition. New York: Wiley-Liss. 2002

5. Brock et al. Biology of Microorganisms, 7th edition. New Jersey. 1994