TTCA2_FRATO
ID TTCA2_FRATO Reviewed; 267 AA.
AC Q0BLX1;
DT 02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT 17-OCT-2006, sequence version 1.
DT 03-AUG-2022, entry version 77.
DE RecName: Full=tRNA-cytidine(32) 2-sulfurtransferase 2 {ECO:0000255|HAMAP-Rule:MF_01850};
DE EC=2.8.1.- {ECO:0000255|HAMAP-Rule:MF_01850};
DE AltName: Full=Two-thiocytidine biosynthesis protein A 2 {ECO:0000255|HAMAP-Rule:MF_01850};
DE AltName: Full=tRNA 2-thiocytidine biosynthesis protein TtcA 2 {ECO:0000255|HAMAP-Rule:MF_01850};
GN Name=ttcA2 {ECO:0000255|HAMAP-Rule:MF_01850}; OrderedLocusNames=FTH_1022;
OS Francisella tularensis subsp. holarctica (strain OSU18).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Thiotrichales;
OC Francisellaceae; Francisella.
OX NCBI_TaxID=393011;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=OSU18;
RX PubMed=16980500; DOI=10.1128/jb.00506-06;
RA Petrosino J.F., Xiang Q., Karpathy S.E., Jiang H., Yerrapragada S., Liu Y.,
RA Gioia J., Hemphill L., Gonzalez A., Raghavan T.M., Uzman A., Fox G.E.,
RA Highlander S., Reichard M., Morton R.J., Clinkenbeard K.D., Weinstock G.M.;
RT "Chromosome rearrangement and diversification of Francisella tularensis
RT revealed by the type B (OSU18) genome sequence.";
RL J. Bacteriol. 188:6977-6985(2006).
CC -!- FUNCTION: Catalyzes the ATP-dependent 2-thiolation of cytidine in
CC position 32 of tRNA, to form 2-thiocytidine (s(2)C32). The sulfur atoms
CC are provided by the cysteine/cysteine desulfurase (IscS) system.
CC {ECO:0000255|HAMAP-Rule:MF_01850}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=AH2 + ATP + cytidine(32) in tRNA + S-sulfanyl-L-cysteinyl-
CC [cysteine desulfurase] = 2-thiocytidine(32) in tRNA + A + AMP +
CC diphosphate + H(+) + L-cysteinyl-[cysteine desulfurase];
CC Xref=Rhea:RHEA:57048, Rhea:RHEA-COMP:10288, Rhea:RHEA-COMP:12157,
CC Rhea:RHEA-COMP:12158, Rhea:RHEA-COMP:14821, ChEBI:CHEBI:13193,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:17499, ChEBI:CHEBI:29950,
CC ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:61963,
CC ChEBI:CHEBI:82748, ChEBI:CHEBI:141453, ChEBI:CHEBI:456215;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01850};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:57049;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01850};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01850};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01850};
CC Note=Binds 1 [4Fe-4S] cluster per subunit. The cluster is chelated by
CC three Cys residues, the fourth Fe has a free coordination site that may
CC bind a sulfur atom transferred from the persulfide of IscS.
CC {ECO:0000255|HAMAP-Rule:MF_01850};
CC -!- PATHWAY: tRNA modification. {ECO:0000255|HAMAP-Rule:MF_01850}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01850}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01850}.
CC -!- MISCELLANEOUS: The thiolation reaction likely consists of two steps: a
CC first activation step by ATP to form an adenylated intermediate of the
CC target base of tRNA, and a second nucleophilic substitution step of the
CC sulfur (S) atom supplied by the hydrosulfide attached to the Fe-S
CC cluster. {ECO:0000255|HAMAP-Rule:MF_01850}.
CC -!- SIMILARITY: Belongs to the TtcA family. {ECO:0000255|HAMAP-
CC Rule:MF_01850}.
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DR EMBL; CP000437; ABI82913.1; -; Genomic_DNA.
DR RefSeq; WP_003015950.1; NC_017463.1.
DR AlphaFoldDB; Q0BLX1; -.
DR SMR; Q0BLX1; -.
DR KEGG; fth:FTH_1022; -.
DR OMA; MNLDQKQ; -.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0016783; F:sulfurtransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0000049; F:tRNA binding; IEA:UniProtKB-KW.
DR GO; GO:0034227; P:tRNA thio-modification; IEA:UniProtKB-UniRule.
DR Gene3D; 3.40.50.620; -; 1.
DR HAMAP; MF_01850; TtcA; 1.
DR InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR InterPro; IPR011063; TilS/TtcA_N.
DR InterPro; IPR012089; tRNA_Cyd_32_2_STrfase.
DR InterPro; IPR035107; tRNA_thiolation_TtcA_Ctu1.
DR Pfam; PF01171; ATP_bind_3; 1.
DR PIRSF; PIRSF004976; ATPase_YdaO; 1.
PE 3: Inferred from homology;
KW 4Fe-4S; ATP-binding; Cytoplasm; Iron; Iron-sulfur; Magnesium;
KW Metal-binding; Nucleotide-binding; RNA-binding; Transferase;
KW tRNA processing; tRNA-binding.
FT CHAIN 1..267
FT /note="tRNA-cytidine(32) 2-sulfurtransferase 2"
FT /id="PRO_0000348734"
FT MOTIF 42..47
FT /note="PP-loop motif"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01850"
FT BINDING 117
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01850"
FT BINDING 120
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01850"
FT BINDING 208
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01850"
SQ SEQUENCE 267 AA; 30985 MW; C10F2C069C3D2173 CRC64;
MTNNTDKQTL KKLERQILRK TTQVINQYNM IEDGDKIMVC LSGGKDSYCL LEMLLLLQKK
APISFEIIAV NLDQKQPGFP EEVLPNYLKN KGVEFHIIER DTYSIVKRVI PEGKTTCGLC
SRMRRGILYD FAEENNVTKV ALGHHRDDII ETFFLNLFYN GSIKAMPTKL LSDDKRNIVI
RPLAFVSEKE TLEYSQLKEF PIIPCNLCGS QDNLQRVFIK DMLNRWEQNN PERKNVIFKA
LSNISPSQML DKELFDFINI SKDDIQR
