Protein Info for Synpcc7942_0139 in Synechococcus elongatus PCC 7942
Name: ilvB
Annotation: acetolactate synthase 3 catalytic subunit
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
Best Hits
Swiss-Prot: 64% identical to ILVB_GUITH: Acetolactate synthase large subunit (ilvB) from Guillardia theta
KEGG orthology group: K01652, acetolactate synthase I/II/III large subunit [EC: 2.2.1.6] (inferred from 100% identity to syf:Synpcc7942_0139)MetaCyc: 50% identical to acetolactate synthase / acetohydroxybutanoate synthase, catalytic subunit (Escherichia coli K-12 substr. MG1655)
Acetolactate synthase. [EC: 2.2.1.6]; 2.2.1.6 [EC: 2.2.1.6]
Predicted SEED Role
"Acetolactate synthase large subunit (EC 2.2.1.6)" in subsystem Acetoin, butanediol metabolism or Branched-Chain Amino Acid Biosynthesis (EC 2.2.1.6)
MetaCyc Pathways
- superpathway of branched chain amino acid biosynthesis (16/17 steps found)
- superpathway of L-isoleucine biosynthesis I (12/13 steps found)
- L-valine biosynthesis (4/4 steps found)
- L-isoleucine biosynthesis I (from threonine) (6/7 steps found)
- pyruvate fermentation to isobutanol (engineered) (4/5 steps found)
- pyruvate fermentation to (R)-acetoin I (2/3 steps found)
- pyruvate fermentation to (S)-acetoin (2/3 steps found)
- L-isoleucine biosynthesis IV (4/6 steps found)
- pyruvate fermentation to (R)-acetoin II (1/2 steps found)
- L-isoleucine biosynthesis III (4/7 steps found)
- superpathway of (R,R)-butanediol biosynthesis (2/5 steps found)
- L-isoleucine biosynthesis II (4/8 steps found)
- superpathway of 2,3-butanediol biosynthesis (2/6 steps found)
- superpathway of L-threonine metabolism (9/18 steps found)
KEGG Metabolic Maps
- Biosynthesis of alkaloids derived from histidine and purine
- Butanoate metabolism
- C5-Branched dibasic acid metabolism
- Pantothenate and CoA biosynthesis
- Valine, leucine and isoleucine biosynthesis
Isozymes
Compare fitness of predicted isozymes for: 2.2.1.6
Use Curated BLAST to search for 2.2.1.6
Sequence Analysis Tools
PaperBLAST (search for papers about homologs of this protein)
Search CDD (the Conserved Domains Database, which includes COG and superfam)
Compare to protein 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 Q31RZ8 at UniProt or InterPro
Protein Sequence (612 amino acids)
>Synpcc7942_0139 acetolactate synthase 3 catalytic subunit (Synechococcus elongatus PCC 7942) VQLQTVTIQQRATGAYALIDSLCQHGVKHIFGYPGGAILPIYDELHRAEAAGRVQHILVR HEQGAVHAADAYSRATGEVGVCFATSGPGATNLVTGIATAQMDSIPMVVVTGQVPRTAIG TDAFQETDIYGITLPIVKHSYVVRDPRDMARIVAEAFHIAQSGRPGPVLIDVPKDVGTEE FDYVPVAPGDIRLPGYRPTTRGNPRQIAQAIALVKVARRPLLYVGGGAITAGAHAELRAF AERFQLPVTTTLMGKGAFDERHPLALGMLGMHGTAYANFAVSECDLLIAVGARFDDRVTG KLDEFASKAQVIHVDIDPAEVGKNRVPEVPIVGDVRQVLNELLARAEEQISADDATRTQP WLDRIAYWKREYPLQIPYYADVLSPQQVIHSLGEAAPDAYFTTDVGQHQMWAAQFIKNGP RRWISSAGLGTMGFGMPAAMGAQMALPDDTVICVAGDASILMNIQELGTLAQYNIPIKVV VVNNGWQGMVRQWQEAFYDERYSNSNMERGMPDFVKLAEAFGIKGMRVSHPDELQAAIAE MLAFDGPVFLDAIVKRDENCYPMVPSGHSNAQMLGLPKDPTLDLDLAIATCSSCGAKTLP SHKFCPDCGAKL