Protein Info for Synpcc7942_1250 in Synechococcus elongatus PCC 7942

Name: psaF
Annotation: photosystem I reaction center subunit III precursor

These analyses and tools can help you predict a protein's function, but be skeptical. For enzymes, over 10% of annotations from KEGG or SEED are probably incorrect. For other types of proteins, the error rates may be much higher. MetaCyc and Swiss-Prot have low error rates, but the best hits in these databases are often quite distant, so this protein's function may not be the same. TIGRFam has low error rates. Finally, many experimentally-characterized proteins are not in any of these databases. To find relevant papers, use PaperBLAST.

Protein Families and Features

1 50 100 159 signal peptide" amino acids 1 to 24 (24 residues), see Phobius details transmembrane" amino acids 81 to 99 (19 residues), see Phobius details PF02507: PSI_PsaF" amino acids 47 to 150 (104 residues), 173 bits, see alignment E=2.7e-55

Best Hits

Swiss-Prot: 100% identical to PSAF_SYNP6: Photosystem I reaction center subunit III (psaF) from Synechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1)

KEGG orthology group: K02694, photosystem I subunit III (inferred from 100% identity to syc:syc0300_d)

MetaCyc: 100% identical to PsaF (Synechococcus elongatus PCC 7942 = FACHB-805)

Predicted SEED Role

"photosystem I subunit III precursor, plastocyanin (cyt c553) docking protein (PsaF)" in subsystem Photosystem I

Sequence Analysis Tools

PaperBLAST (search for papers about homologs of this protein)

Search CDD (the Conserved Domains Database, which includes COG and superfam)

Search structures

Predict protein localization: PSORTb (Gram-negative bacteria)

Predict transmembrane helices and signal peptides: Phobius

Check the current SEED with FIGfam search

Find homologs in fast.genomics or the ENIGMA genome browser

See Q31NT9 at UniProt or InterPro

Protein Sequence (159 amino acids)

>Synpcc7942_1250 photosystem I reaction center subunit III precursor (Synechococcus elongatus PCC 7942)
MRRLFAVVLAACLWLGFAPQASADVAGLTPCSESPRFIQRAEAAATPQAKARFENYSQAL
CGADGLPHLIVDGRLDHAGDFIIPSLLFLYIAGWIGWVGRSYLQAIKSDKDAAGKEIVID
VPLAVKFSLTGFAWPLAAFQEFSSGKLLAKADEITVSPR