CFR_CLOBK
ID CFR_CLOBK Reviewed; 344 AA.
AC B1IL14;
DT 02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT 29-APR-2008, sequence version 1.
DT 03-AUG-2022, entry version 77.
DE RecName: Full=Ribosomal RNA large subunit methyltransferase Cfr {ECO:0000255|HAMAP-Rule:MF_01873};
DE EC=2.1.1.224 {ECO:0000255|HAMAP-Rule:MF_01873};
DE AltName: Full=23S rRNA (adenine(2503)-C(8))-methyltransferase {ECO:0000255|HAMAP-Rule:MF_01873};
DE AltName: Full=23S rRNA m8A2503 methyltransferase {ECO:0000255|HAMAP-Rule:MF_01873};
GN Name=cfr {ECO:0000255|HAMAP-Rule:MF_01873}; OrderedLocusNames=CLD_1710;
OS Clostridium botulinum (strain Okra / Type B1).
OC Bacteria; Firmicutes; Clostridia; Eubacteriales; Clostridiaceae;
OC Clostridium.
OX NCBI_TaxID=498213;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Okra / Type B1;
RX PubMed=18060065; DOI=10.1371/journal.pone.0001271;
RA Smith T.J., Hill K.K., Foley B.T., Detter J.C., Munk A.C., Bruce D.C.,
RA Doggett N.A., Smith L.A., Marks J.D., Xie G., Brettin T.S.;
RT "Analysis of the neurotoxin complex genes in Clostridium botulinum A1-A4
RT and B1 strains: BoNT/A3, /Ba4 and /B1 clusters are located within
RT plasmids.";
RL PLoS ONE 2:E1271-E1271(2007).
CC -!- FUNCTION: Specifically methylates position 8 of adenine 2503 in 23S
CC rRNA. Confers resistance to some classes of antibiotics.
CC {ECO:0000255|HAMAP-Rule:MF_01873}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=adenosine(2503) in 23S rRNA + 2 reduced [2Fe-2S]-[ferredoxin]
CC + 2 S-adenosyl-L-methionine = 5'-deoxyadenosine + 8-
CC methyladenosine(2503) in 23S rRNA + L-methionine + 2 oxidized [2Fe-
CC 2S]-[ferredoxin] + S-adenosyl-L-homocysteine; Xref=Rhea:RHEA:42632,
CC Rhea:RHEA-COMP:10000, Rhea:RHEA-COMP:10001, Rhea:RHEA-COMP:10152,
CC Rhea:RHEA-COMP:10153, ChEBI:CHEBI:17319, ChEBI:CHEBI:33737,
CC ChEBI:CHEBI:33738, ChEBI:CHEBI:57844, ChEBI:CHEBI:57856,
CC ChEBI:CHEBI:59789, ChEBI:CHEBI:74411, ChEBI:CHEBI:74543;
CC EC=2.1.1.224; Evidence={ECO:0000255|HAMAP-Rule:MF_01873};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01873};
CC Note=Binds 1 [4Fe-4S] cluster. The cluster is coordinated with 3
CC cysteines and an exchangeable S-adenosyl-L-methionine.
CC {ECO:0000255|HAMAP-Rule:MF_01873};
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01873}.
CC -!- MISCELLANEOUS: Reaction proceeds by a ping-pong mechanism involving
CC intermediate methylation of a conserved cysteine residue.
CC {ECO:0000255|HAMAP-Rule:MF_01873}.
CC -!- SIMILARITY: Belongs to the radical SAM superfamily. RlmN family. Cfr
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_01873}.
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DR EMBL; CP000939; ACA43818.1; -; Genomic_DNA.
DR RefSeq; WP_015957497.1; NC_010516.1.
DR AlphaFoldDB; B1IL14; -.
DR SMR; B1IL14; -.
DR EnsemblBacteria; ACA43818; ACA43818; CLD_1710.
DR KEGG; cbb:CLD_1710; -.
DR HOGENOM; CLU_029101_0_2_9; -.
DR OMA; RIFFEWT; -.
DR Proteomes; UP000008541; Chromosome.
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:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0016433; F:rRNA (adenine) methyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0046677; P:response to antibiotic; IEA:UniProtKB-KW.
DR GO; GO:0070475; P:rRNA base methylation; IEA:UniProtKB-UniRule.
DR Gene3D; 3.20.20.70; -; 1.
DR HAMAP; MF_01873; 23SrRNA_methyltr_Cfr; 1.
DR InterPro; IPR013785; Aldolase_TIM.
DR InterPro; IPR040072; Methyltransferase_A.
DR InterPro; IPR022881; rRNA_lsu_MeTfrase_Cfr.
DR InterPro; IPR004383; rRNA_lsu_MTrfase_RlmN/Cfr.
DR InterPro; IPR007197; rSAM.
DR PANTHER; PTHR30544; PTHR30544; 1.
DR Pfam; PF04055; Radical_SAM; 1.
DR PIRSF; PIRSF006004; CHP00048; 1.
DR SFLD; SFLDF00275; adenosine_C2_methyltransferase; 1.
DR SFLD; SFLDF00296; adenosine_C8_methyltransferase; 1.
DR SFLD; SFLDS00029; Radical_SAM; 1.
DR TIGRFAMs; TIGR04432; rSAM_Cfr; 1.
DR PROSITE; PS51918; RADICAL_SAM; 1.
PE 3: Inferred from homology;
KW 4Fe-4S; Antibiotic resistance; Cytoplasm; Disulfide bond; Iron;
KW Iron-sulfur; Metal-binding; Methyltransferase; rRNA processing;
KW S-adenosyl-L-methionine; Transferase.
FT CHAIN 1..344
FT /note="Ribosomal RNA large subunit methyltransferase Cfr"
FT /id="PRO_0000350122"
FT DOMAIN 97..330
FT /note="Radical SAM core"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01266"
FT ACT_SITE 90
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT ACT_SITE 335
FT /note="S-methylcysteine intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 111
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="4Fe-4S-S-AdoMet"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 115
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="4Fe-4S-S-AdoMet"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 118
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /ligand_note="4Fe-4S-S-AdoMet"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 157..158
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 188
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 211..213
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT BINDING 292
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
FT DISULFID 104..335
FT /note="(transient)"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01873"
SQ SEQUENCE 344 AA; 39109 MW; 66D7A448F0E17E1B CRC64;
MKQTKTKYGK MKQMVSNLKL PDYRYEQLTK AIFHQRIDNF DDIHILPKAL RMSLVNEFGK
NVSSVIPVFS QDSKQAQKLL FELTDGERIE AVGLKYKQGW ESFCISSQCG CGFGCRFCAT
GSAGFKRNLT ADEITDQLLY FYFNNHRLNS ISFMGMGEAF ANPELFDAVK ILTDQNLFGL
SQRRITISTI GIIPGIQRLT KKFPQVNLAF SLHSPFESRR SDLMPINKRF PLNEVMKTLD
EHIIHTGRRV FIAYIMLEGI NDSKEHAEAV VGLLKNRGSW EHLYHIDLIP YNSTDKTTFK
FQSSSAIKQF CSTLKKAGIS ATVRTQFGSE ISAACGQLCY ENEL
