>TIGR01139 cysK cysteine synthase A; InterPro: IPR005859 This model discriminates cysteine synthase A (CysK) and cysteine synthase B (CysM) from cystathionine beta-synthase, a protein found primarily in eukaryotes and carrying a C-terminal CBS domain lacking from this protein. Bacterial proteins lacking the CBS domain but otherwise showing resemblance to cystathionine beta-synthases and considerable phylogenetic distance from known cysteine synthases were excluded. Cysteine synthase (O-acetylserine (thiol)-lyase, 2.5.1.47 from EC) is the enzyme responsible for the formation of cysteine from O-acetyl-serine and hydrogen sulphide with the concomitant release of acetic acid. In bacteria such two forms of the enzyme are known (genes cysK and cysM). CysK differs from CysM in that it can also use sulphide instead of thiosulphate, to produce cysteine instead of cysteine thiosulphonate. ; GO: 0004124 cysteine synthase activity, 0006535 cysteine biosynthetic process from serine.

Probab=90.26 E-value=1.5 Score=23.48 Aligned_cols=93 Identities=22% Similarity=0.258 Sum_probs=62.3 Q ss_pred CHHCCCCEEEEECCCCCCHHHHHHHHHHHHCCCEEEEEEC---CHH-----------------------HHHHHHHHHHC Q ss_conf 2322997899948898841799999999988988999848---988-----------------------99999999713 Q gi|254781166|r 5 DNLMKDKRGIVLGVANNRSLAWSIAKMCHAAGAKVALTWQ---GDA-----------------------TKKRIEGLVEG 58 (284) Q Consensus 5 ~~~L~~K~~iVtGa~g~~GIG~aiA~~la~~Ga~Vvi~~~---~~~-----------------------~~~~~~~~~~~ 58 (284) T Consensus 53 ~G~lk~G~~IvEpTSGNTGIaLAmv--AAArGYkliltMPetMS~ERr~lL~ayGAeLvLTpg~~GMkGAI~KA~Ei~~~ 130 (312) T TIGR01139 53 RGLLKPGKTIVEPTSGNTGIALAMV--AAARGYKLILTMPETMSIERRKLLKAYGAELVLTPGAEGMKGAIAKAEEIAES 130 (312) T ss_pred CCCCCCCCEEEECCCCCHHHHHHHH--HHHHCCEEEEECCCCHHHHHHHHHHHCCCEEEECCCCCCCHHHHHHHHHHHHH T ss_conf 5886888889823777326999999--98718949998674326899999987096588728123766678999999986 Q ss_pred CCC-E-EEEE-CCCCCHHHHHH-HHHHHHHHH-CC--CCEEEECCCCC Q ss_conf 892-8-9998-88999999999-999999984-79--88999627212 Q gi|254781166|r 59 MDF-F-MAGH-CNVSNSETIDD-VFRNLEKEW-GT--IDFLVHAIAFS 99 (284) Q Consensus 59 ~~~-~-~~~~-~Dv~~~~~v~~-~~~~~~~~~-G~--iD~lInnag~~ 99 (284) T Consensus 131 ~Pn~y~m~~QF~NpANP~~Hr~TTg~EIw~d~dg~G~~D~FVaG~GTG 178 (312) T TIGR01139 131 TPNSYFMLQQFENPANPEIHRKTTGPEIWRDTDGKGRLDAFVAGVGTG 178 (312) T ss_pred CCCCEEECCCCCCCCHHHHHHHCCHHHHHHHHCCCCCEEEEEEEECCC T ss_conf 879265224578722147616202789999627898311799732368

HHsearch alignment for GI: 254781166 and conserved domain: TIGR01139