Functional Information from GO Data
| Chain | GOid | namespace | contents | 
| A | 0003824 | molecular_function | catalytic activity | 
| A | 0004124 | molecular_function | cysteine synthase activity | 
| A | 0005737 | cellular_component | cytoplasm | 
| A | 0006535 | biological_process | cysteine biosynthetic process from serine | 
| A | 0008652 | biological_process | amino acid biosynthetic process | 
| A | 0016740 | molecular_function | transferase activity | 
| A | 0016765 | molecular_function | transferase activity, transferring alkyl or aryl (other than methyl) groups | 
| A | 0019344 | biological_process | cysteine biosynthetic process | 
| A | 0080146 | molecular_function | L-cysteine desulfhydrase activity | 
Functional Information from PROSITE/UniProt
| site_id | PS00901 | 
| Number of Residues | 19 | 
| Details | CYS_SYNTHASE Cysteine synthase/cystathionine beta-synthase P-phosphate attachment site. KiEgrn.PSySVKcRiGanM | 
| Chain | Residue | Details | 
| A | LYS31-MET49 |  | 
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 | 
| Number of Residues | 1 | 
| Details | Binding site: {"evidences":[{"source":"UniProtKB","id":"P0A1E3","evidenceCode":"ECO:0000250"}]} | 
| site_id | SWS_FT_FI2 | 
| Number of Residues | 2 | 
| Details | Binding site: {"description":"in other chain","evidences":[{"source":"UniProtKB","id":"P0A1E3","evidenceCode":"ECO:0000250"}]} | 
| site_id | SWS_FT_FI3 | 
| Number of Residues | 6 | 
| Details | Binding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]} | 
| site_id | SWS_FT_FI4 | 
| Number of Residues | 1 | 
| Details | Modified residue: {"description":"N6-(pyridoxal phosphate)lysine","evidences":[{"evidenceCode":"ECO:0000250"}]} |