HMM Summary Page: TIGR01157

Functionphotosynthetic reaction center L subunit
Gene SymbolpufL
Trusted Cutoff266.20
Domain Trusted Cutoff266.20
Noise Cutoff206.65
Domain Noise Cutoff206.65
Isology Typeequivalog
HMM Length239
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 6:22PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model describes the photosynthetic reaction center L 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 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 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)