ID A4BCL4_9GAMM Unreviewed; 310 AA.
AC A4BCL4;
DT 03-APR-2007, integrated into UniProtKB/TrEMBL.
DT 03-APR-2007, sequence version 1.
DT 27-MAR-2024, entry version 72.
DE RecName: Full=tRNA-cytidine(32) 2-sulfurtransferase {ECO:0000256|HAMAP-Rule:MF_01850};
DE EC=2.8.1.- {ECO:0000256|HAMAP-Rule:MF_01850};
DE AltName: Full=Two-thiocytidine biosynthesis protein A {ECO:0000256|HAMAP-Rule:MF_01850};
DE AltName: Full=tRNA 2-thiocytidine biosynthesis protein TtcA {ECO:0000256|HAMAP-Rule:MF_01850};
GN Name=ttcA {ECO:0000256|HAMAP-Rule:MF_01850};
GN ORFNames=MED297_13692 {ECO:0000313|EMBL:EAR10280.1};
OS Reinekea blandensis MED297.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Oceanospirillales;
OC Saccharospirillaceae; Reinekea.
OX NCBI_TaxID=314283 {ECO:0000313|EMBL:EAR10280.1, ECO:0000313|Proteomes:UP000005953};
RN [1] {ECO:0000313|EMBL:EAR10280.1, ECO:0000313|Proteomes:UP000005953}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=MED297 {ECO:0000313|EMBL:EAR10280.1,
RC ECO:0000313|Proteomes:UP000005953};
RA Pinhassi J., Pedros-Alio C., Ferriera S., Johnson J., Kravitz S.,
RA Halpern A., Remington K., Beeson K., Tran B., Rogers Y.-H., Friedman R.,
RA Venter J.C.;
RL Submitted (FEB-2006) to the EMBL/GenBank/DDBJ databases.
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:0000256|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:0000256|HAMAP-Rule:MF_01850};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01850};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000256|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:0000256|HAMAP-Rule:MF_01850};
CC -!- PATHWAY: tRNA modification. {ECO:0000256|HAMAP-Rule:MF_01850}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01850}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|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:0000256|HAMAP-Rule:MF_01850}.
CC -!- SIMILARITY: Belongs to the TtcA family. {ECO:0000256|HAMAP-
CC Rule:MF_01850}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EAR10280.1}.
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DR EMBL; AAOE01000005; EAR10280.1; -; Genomic_DNA.
DR AlphaFoldDB; A4BCL4; -.
DR STRING; 314283.MED297_13692; -.
DR HOGENOM; CLU_026481_0_0_6; -.
DR OrthoDB; 9801054at2; -.
DR Proteomes; UP000005953; Unassembled WGS sequence.
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 CDD; cd01993; Alpha_ANH_like_II; 1.
DR Gene3D; 3.40.50.620; HUPs; 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 PANTHER; PTHR43686; SULFURTRANSFERASE-RELATED; 1.
DR PANTHER; PTHR43686:SF1; TRNA-CYTIDINE(32) 2-SULFURTRANSFERASE; 1.
DR Pfam; PF01171; ATP_bind_3; 1.
DR PIRSF; PIRSF004976; ATPase_YdaO; 1.
DR SUPFAM; SSF52402; Adenine nucleotide alpha hydrolases-like; 1.
PE 3: Inferred from homology;
KW 4Fe-4S {ECO:0000256|ARBA:ARBA00022485, ECO:0000256|HAMAP-Rule:MF_01850};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_01850};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01850};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_01850};
KW Iron-sulfur {ECO:0000256|ARBA:ARBA00023014, ECO:0000256|HAMAP-
KW Rule:MF_01850};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01850};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01850};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_01850}; Reference proteome {ECO:0000313|Proteomes:UP000005953};
KW RNA-binding {ECO:0000256|ARBA:ARBA00022884, ECO:0000256|HAMAP-
KW Rule:MF_01850};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01850};
KW tRNA processing {ECO:0000256|ARBA:ARBA00022694, ECO:0000256|HAMAP-
KW Rule:MF_01850}; tRNA-binding {ECO:0000256|HAMAP-Rule:MF_01850}.
FT DOMAIN 40..203
FT /note="tRNA(Ile)-lysidine/2-thiocytidine synthase N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF01171"
FT MOTIF 45..50
FT /note="PP-loop motif"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01850"
FT BINDING 120
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01850"
FT BINDING 123
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01850"
FT BINDING 211
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01850"
SQ SEQUENCE 310 AA; 35061 MW; 535002694729FC6F CRC64;
MTASLSGKEK LEFNKLQKRL RREAGRAIAD YNMIEEGDRI MVCLSGGKDS FTMLDILMSL
QKSAPVNFEL IAVNLDQKQP GFPEHILPEY LKSVGVPFHI LERDTYSIVQ ETVPEGKTTC
GICSRLRRST IYAFADQIGA NKVALGHHRD DIIETLFLNM FYGGKLKAMP PKLLSDSKSN
ILIRPLAYCR ESDIEEFARL KNYPIIPCNL CGSQENLQRQ NIKAMCREWE KQFPGRIENI
FRAIGHVSPS QLADRSLYDF ESLEISAIPM TPMNDVSEYS PLASTVVNTW VPEESELNGN
DTFEVDQTTI
//
