HMM Summary Page: TIGR01150

Functionphotosynthetic reaction center H subunit
Gene SymbolpuhA
Trusted Cutoff240.40
Domain Trusted Cutoff240.40
Noise Cutoff118.30
Domain Noise Cutoff118.30
Isology Typeequivalog
HMM Length252
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 DateFeb 4 2001 5:54PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model describes the photosynthetic reaction center H subunit in non-oxygenic photosynthetic bacteria. The reaction center is an integral membrane pigment-protein that carries out light-driven electron transfer reactions. At the core of reaction 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 the form of NADH. Ultimately, the process results in the reduction of C02 to carbohydrates(C6H12O6) In non-oxygenic organisms, the electron donor is an organic acid rather than water. Much of our current functional understanding of photosynthesis comes from the structural determination and spectroscopic studies on the reaction center of Rhodobacter sphaeroides.
Genome PropertyGenProp0662: photosynthetic reaction center, alphaproteobacterial type (HMM)