ID   CYSK_POPEU              Reviewed;          29 AA.
AC   P84538;
DT   21-JUN-2005, integrated into UniProtKB/Swiss-Prot.
DT   21-JUN-2005, sequence version 1.
DT   25-MAY-2022, entry version 41.
DE   RecName: Full=Cysteine synthase;
DE            Short=CSase;
DE            EC=2.5.1.47;
DE   AltName: Full=O-acetylserine (thiol)-lyase;
DE            Short=OAS-TL;
DE   AltName: Full=O-acetylserine sulfhydrylase;
DE   Flags: Fragments;
OS   Populus euphratica (Euphrates poplar).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Malpighiales; Salicaceae; Saliceae; Populus.
OX   NCBI_TaxID=75702;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Leaf;
RX   PubMed=16740589; DOI=10.1093/aob/mcl106;
RA   Ferreira S., Hjernoe K., Larsen M., Wingsle G., Larsen P., Fey S.,
RA   Roepstorff P., Pais M.S.;
RT   "Proteome profiling of Populus euphratica Oliv. upon heat stress.";
RL   Ann. Bot. 98:361-377(2006).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=hydrogen sulfide + O-acetyl-L-serine = acetate + L-cysteine;
CC         Xref=Rhea:RHEA:14829, ChEBI:CHEBI:29919, ChEBI:CHEBI:30089,
CC         ChEBI:CHEBI:35235, ChEBI:CHEBI:58340; EC=2.5.1.47;
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000250|UniProtKB:Q00834};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-cysteine biosynthesis; L-cysteine
CC       from L-serine: step 2/2.
CC   -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:Q00834}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the cysteine synthase/cystathionine beta-
CC       synthase family. {ECO:0000255}.
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DR   AlphaFoldDB; P84538; -.
DR   UniPathway; UPA00136; UER00200.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004124; F:cysteine synthase activity; IEA:UniProtKB-EC.
PE   1: Evidence at protein level;
KW   Amino-acid biosynthesis; Cysteine biosynthesis; Cytoplasm;
KW   Direct protein sequencing; Pyridoxal phosphate; Transferase.
FT   CHAIN           <1..>29
FT                   /note="Cysteine synthase"
FT                   /id="PRO_0000167123"
FT   NON_CONS        17..18
FT                   /evidence="ECO:0000305"
FT   NON_TER         1
FT   NON_TER         29
SQ   SEQUENCE   29 AA;  3292 MW;  F131D660D6AA8E05 CRC64;
     TPNSYILQQF ENPANPKLIV AIFPSFGER