ISCS_RICPR
ID ISCS_RICPR Reviewed; 410 AA.
AC Q9ZD60;
DT 27-APR-2001, integrated into UniProtKB/Swiss-Prot.
DT 01-MAY-1999, sequence version 1.
DT 03-AUG-2022, entry version 119.
DE RecName: Full=Cysteine desulfurase IscS {ECO:0000255|HAMAP-Rule:MF_00331};
DE EC=2.8.1.7 {ECO:0000255|HAMAP-Rule:MF_00331};
GN Name=iscS {ECO:0000255|HAMAP-Rule:MF_00331}; OrderedLocusNames=RP486;
OS Rickettsia prowazekii (strain Madrid E).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC Rickettsiaceae; Rickettsieae; Rickettsia; typhus group.
OX NCBI_TaxID=272947;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Madrid E;
RX PubMed=9823893; DOI=10.1038/24094;
RA Andersson S.G.E., Zomorodipour A., Andersson J.O., Sicheritz-Ponten T.,
RA Alsmark U.C.M., Podowski R.M., Naeslund A.K., Eriksson A.-S., Winkler H.H.,
RA Kurland C.G.;
RT "The genome sequence of Rickettsia prowazekii and the origin of
RT mitochondria.";
RL Nature 396:133-140(1998).
CC -!- FUNCTION: Master enzyme that delivers sulfur to a number of partners
CC involved in Fe-S cluster assembly, tRNA modification or cofactor
CC biosynthesis. Catalyzes the removal of elemental sulfur atoms from
CC cysteine to produce alanine. Functions as a sulfur delivery protein for
CC Fe-S cluster synthesis onto IscU, an Fe-S scaffold assembly protein, as
CC well as other S acceptor proteins. {ECO:0000255|HAMAP-Rule:MF_00331}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=[sulfur carrier]-H + L-cysteine = [sulfur carrier]-SH + L-
CC alanine; Xref=Rhea:RHEA:43892, Rhea:RHEA-COMP:14737, Rhea:RHEA-
CC COMP:14739, ChEBI:CHEBI:29917, ChEBI:CHEBI:35235, ChEBI:CHEBI:57972,
CC ChEBI:CHEBI:64428; EC=2.8.1.7; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00331};
CC -!- COFACTOR:
CC Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00331};
CC -!- PATHWAY: Cofactor biosynthesis; iron-sulfur cluster biosynthesis.
CC {ECO:0000255|HAMAP-Rule:MF_00331}.
CC -!- SUBUNIT: Homodimer. Forms a heterotetramer with IscU, interacts with
CC other sulfur acceptors. {ECO:0000255|HAMAP-Rule:MF_00331}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00331}.
CC -!- SIMILARITY: Belongs to the class-V pyridoxal-phosphate-dependent
CC aminotransferase family. NifS/IscS subfamily. {ECO:0000255|HAMAP-
CC Rule:MF_00331}.
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DR EMBL; AJ235272; CAA14939.1; -; Genomic_DNA.
DR PIR; A71652; A71652.
DR RefSeq; NP_220863.1; NC_000963.1.
DR RefSeq; WP_004597728.1; NC_000963.1.
DR AlphaFoldDB; Q9ZD60; -.
DR SMR; Q9ZD60; -.
DR STRING; 272947.RP486; -.
DR EnsemblBacteria; CAA14939; CAA14939; CAA14939.
DR GeneID; 57569611; -.
DR KEGG; rpr:RP486; -.
DR PATRIC; fig|272947.5.peg.496; -.
DR eggNOG; COG1104; Bacteria.
DR HOGENOM; CLU_003433_0_2_5; -.
DR OMA; APHIINF; -.
DR UniPathway; UPA00266; -.
DR Proteomes; UP000002480; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR GO; GO:0031071; F:cysteine desulfurase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0030170; F:pyridoxal phosphate binding; IEA:UniProtKB-UniRule.
DR GO; GO:0044571; P:[2Fe-2S] cluster assembly; IEA:UniProtKB-UniRule.
DR Gene3D; 3.40.640.10; -; 1.
DR Gene3D; 3.90.1150.10; -; 1.
DR HAMAP; MF_00331; Cys_desulf_IscS; 1.
DR InterPro; IPR000192; Aminotrans_V_dom.
DR InterPro; IPR020578; Aminotrans_V_PyrdxlP_BS.
DR InterPro; IPR010240; Cys_deSase_IscS.
DR InterPro; IPR016454; Cysteine_dSase.
DR InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR InterPro; IPR015422; PyrdxlP-dep_Trfase_small.
DR PANTHER; PTHR11601:SF34; PTHR11601:SF34; 1.
DR Pfam; PF00266; Aminotran_5; 1.
DR PIRSF; PIRSF005572; NifS; 1.
DR SUPFAM; SSF53383; SSF53383; 1.
DR TIGRFAMs; TIGR02006; IscS; 1.
DR PROSITE; PS00595; AA_TRANSFER_CLASS_5; 1.
PE 3: Inferred from homology;
KW 2Fe-2S; Cytoplasm; Iron; Iron-sulfur; Metal-binding; Pyridoxal phosphate;
KW Reference proteome; Transferase.
FT CHAIN 1..410
FT /note="Cysteine desulfurase IscS"
FT /id="PRO_0000150276"
FT ACT_SITE 334
FT /note="Cysteine persulfide intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 80..81
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 160
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 188
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 208..210
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 248
FT /ligand="pyridoxal 5'-phosphate"
FT /ligand_id="ChEBI:CHEBI:597326"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT BINDING 334
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /ligand_note="ligand shared with IscU"
FT /note="via persulfide group"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
FT MOD_RES 211
FT /note="N6-(pyridoxal phosphate)lysine"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00331"
SQ SEQUENCE 410 AA; 45598 MW; C880ACA542DFF9C8 CRC64;
MNQQLKNLTL PIYMDYQSTT PIDPRVMEAM LPYFTTKFGN PHSRSHSFGW EAENAVENAR
SMVAKVIGAD SKEIIFTSGA TESNNLVIKG IAKFYGNKKK HIITLVSEHK CVLNACRHLE
QEGIKITYLP IKSNGIIDLE TLKNAITDQT LLVSVMAVNN EIGVIQPLKE IGKICRERNV
FFHSDIAQGF GKIPINVNEC NIDLASISGH KIYGPKGIGA LYIRKKPRVR VTPLINGGGQ
ERGMRSGTLP TPLIVGLGIA SEIAYNEMEK DTQHVNYLFD RFLNNIHSKI SEVYLNGDKD
QRYKGNLNLS FAGVEGESII LAIKDLAVSS GSACTSASLE PSYVLRSIGI SEELAHTSIR
FGIGRFTTEQ EIDYAVNLVC SKIDKLRRLS PLWEMMQEGV DLKKIRWTAH
