HMM Summary Page: TIGR01115

Functionphotosynthetic reaction center M subunit
Gene SymbolpufM
Trusted Cutoff364.25
Domain Trusted Cutoff364.25
Noise Cutoff248.65
Domain Noise Cutoff248.65
Isology Typeequivalog
HMM Length305
Mainrole CategoryEnergy metabolism
Subrole CategoryElectron transport
Gene Ontology TermGO:0005488: binding molecular_function
GO:0009521: photosystem cellular_component
GO:0019684: photosynthesis, light reaction biological_process
AuthorUjwal ML, Paulsen IT
Entry DateJan 9 2001 4:14PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model decribes the photosynthetic reaction center M subunit in non-oxygenic photosynthetic bacteria. Reaction center is an integral membrane pigment-protein that carries out light-driven electron transfer reactions. At the core of reacion center is a collection light-harvesting cofactors and closely associated polypeptides. The core protein complex is made of L, M and H subunits. The common cofactors include bacterichlorophyll, bacteriopheophytins, ubiquinone and no-heme ferrous iron. The net result of electron tranfer reactions is the establishment of proton electrochemical gradient and production of reducing equivalents in form of NADH. Ultimately the process results in the reduction of C02 to carbohydrates(C6H12O6) In non-oxygenic organisms, the electron donor is some organic acid and not water. Much of our current functional understanding of photosynthesis comes from the structural determination, spectroscopic studies and mutational analysis on the reaction center of Rhodobacter sphaeroides.
Genome PropertyGenProp0662: photosynthetic reaction center, alphaproteobacterial type (HMM)