ID   RIR2_HELPJ              Reviewed;         341 AA.
AC   Q9ZKC3;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1999, sequence version 1.
DT   03-AUG-2022, entry version 130.
DE   RecName: Full=Ribonucleoside-diphosphate reductase subunit beta;
DE            EC=1.17.4.1;
DE   AltName: Full=Ribonucleotide reductase small subunit;
GN   Name=nrdB; OrderedLocusNames=jhp_1016;
OS   Helicobacter pylori (strain J99 / ATCC 700824) (Campylobacter pylori J99).
OC   Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC   Helicobacteraceae; Helicobacter.
OX   NCBI_TaxID=85963;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=J99 / ATCC 700824;
RX   PubMed=9923682; DOI=10.1038/16495;
RA   Alm R.A., Ling L.-S.L., Moir D.T., King B.L., Brown E.D., Doig P.C.,
RA   Smith D.R., Noonan B., Guild B.C., deJonge B.L., Carmel G., Tummino P.J.,
RA   Caruso A., Uria-Nickelsen M., Mills D.M., Ives C., Gibson R., Merberg D.,
RA   Mills S.D., Jiang Q., Taylor D.E., Vovis G.F., Trust T.J.;
RT   "Genomic sequence comparison of two unrelated isolates of the human gastric
RT   pathogen Helicobacter pylori.";
RL   Nature 397:176-180(1999).
CC   -!- FUNCTION: Provides the precursors necessary for DNA synthesis.
CC       Catalyzes the biosynthesis of deoxyribonucleotides from the
CC       corresponding ribonucleotides (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[thioredoxin]-disulfide + a 2'-deoxyribonucleoside 5'-
CC         diphosphate + H2O = [thioredoxin]-dithiol + a ribonucleoside 5'-
CC         diphosphate; Xref=Rhea:RHEA:23252, Rhea:RHEA-COMP:10698, Rhea:RHEA-
CC         COMP:10700, ChEBI:CHEBI:15377, ChEBI:CHEBI:29950, ChEBI:CHEBI:50058,
CC         ChEBI:CHEBI:57930, ChEBI:CHEBI:73316; EC=1.17.4.1;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU10014};
CC   -!- COFACTOR:
CC       Name=Fe cation; Xref=ChEBI:CHEBI:24875; Evidence={ECO:0000250};
CC       Note=Binds 2 iron ions per subunit. {ECO:0000250};
CC   -!- PATHWAY: Genetic information processing; DNA replication.
CC   -!- SUBUNIT: Tetramer of two alpha and two beta subunits. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ribonucleoside diphosphate reductase small
CC       chain family. {ECO:0000305}.
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DR   EMBL; AE001439; AAD06604.1; -; Genomic_DNA.
DR   PIR; C71858; C71858.
DR   RefSeq; WP_000453998.1; NZ_CP011330.1.
DR   AlphaFoldDB; Q9ZKC3; -.
DR   SMR; Q9ZKC3; -.
DR   STRING; 85963.jhp_1016; -.
DR   EnsemblBacteria; AAD06604; AAD06604; jhp_1016.
DR   KEGG; hpj:jhp_1016; -.
DR   PATRIC; fig|85963.30.peg.1574; -.
DR   eggNOG; COG0208; Bacteria.
DR   OMA; KVGEYQR; -.
DR   UniPathway; UPA00326; -.
DR   Proteomes; UP000000804; Chromosome.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0004748; F:ribonucleoside-diphosphate reductase activity, thioredoxin disulfide as acceptor; IEA:UniProtKB-EC.
DR   GO; GO:0009263; P:deoxyribonucleotide biosynthetic process; IEA:InterPro.
DR   GO; GO:0006260; P:DNA replication; IEA:UniProtKB-UniPathway.
DR   CDD; cd01049; RNRR2; 1.
DR   Gene3D; 1.10.620.20; -; 1.
DR   InterPro; IPR009078; Ferritin-like_SF.
DR   InterPro; IPR012348; RNR-like.
DR   InterPro; IPR033909; RNR_small.
DR   InterPro; IPR030475; RNR_small_AS.
DR   InterPro; IPR000358; RNR_small_fam.
DR   PANTHER; PTHR23409; PTHR23409; 1.
DR   Pfam; PF00268; Ribonuc_red_sm; 1.
DR   PIRSF; PIRSF000355; NrdB; 1.
DR   SUPFAM; SSF47240; SSF47240; 1.
DR   PROSITE; PS00368; RIBORED_SMALL; 1.
PE   3: Inferred from homology;
KW   Deoxyribonucleotide synthesis; Iron; Metal-binding; Oxidoreductase.
FT   CHAIN           1..341
FT                   /note="Ribonucleoside-diphosphate reductase subunit beta"
FT                   /id="PRO_0000190481"
FT   ACT_SITE        127
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10014"
FT   BINDING         89
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10014"
FT   BINDING         120
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10014"
FT   BINDING         120
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         123
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10014"
FT   BINDING         185
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         219
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         222
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   341 AA;  39528 MW;  248E7E1AE1E4CD74 CRC64;
     MEVSRKKIYN PNSTESVNER KIFGGNPTSM FDLNKIKYQW ADHLWKTMLA NTWFAEEVSM
     NDDKRDYLKL SAEEKIGYDR ALAQLIFMDS LQANNLIDNI NPFITSPEIN LCLVRQAYEE
     ALHSHAYAVM VESISANTEE IYDMWRNDMQ LKSKNDYIAQ VYMELAKNPT EENILKALFA
     NQILEGIYFY SGFSYFYTLA RSGKMLGSAQ MIRFIQRDEV THLILFQNMI NALRNERADL
     FTPQLINEVI EMFKKAVEIE ASWGDYITQG KILGLTSSLI EQYIQFLADS RLSKVGIAKV
     YGVQHPIKWV ESFSSFNEQR SNFFEARVSN YAKGSVSFDD F