ID   YB3_XENLA               Reviewed;         305 AA.
AC   Q00436;
DT   01-DEC-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-1992, sequence version 1.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=B box-binding protein;
DE   AltName: Full=Protein YB3;
OS   Xenopus laevis (African clawed frog).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Amphibia;
OC   Batrachia; Anura; Pipoidea; Pipidae; Xenopodinae; Xenopus; Xenopus.
OX   NCBI_TaxID=8355;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Ovary;
RX   PubMed=1891365; DOI=10.1093/nar/19.17.4753;
RA   Cohen I., Reynolds W.F.;
RT   "The Xenopus YB3 protein binds the B box element of the class III
RT   promoter.";
RL   Nucleic Acids Res. 19:4753-4759(1991).
CC   -!- FUNCTION: Binds the B box promoter element of genes transcribed by RNA
CC       polymerase III and is probably involved in the regulation of class III
CC       genes.
CC   -!- SUBCELLULAR LOCATION: Nucleus.
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DR   EMBL; X60217; CAA42778.1; -; mRNA.
DR   PIR; S22313; S22313.
DR   RefSeq; NP_001080330.1; NM_001086861.1.
DR   AlphaFoldDB; Q00436; -.
DR   SMR; Q00436; -.
DR   GeneID; 380022; -.
DR   KEGG; xla:380022; -.
DR   CTD; 380022; -.
DR   Xenbase; XB-GENE-17338642; ybx1.S.
DR   OrthoDB; 1431946at2759; -.
DR   Proteomes; UP000186698; Chromosome 7S.
DR   Bgee; 380022; Expressed in neurula embryo and 19 other tissues.
DR   GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   CDD; cd04458; CSP_CDS; 1.
DR   Gene3D; 2.40.50.140; -; 1.
DR   InterPro; IPR011129; CSD.
DR   InterPro; IPR019844; CSD_1.
DR   InterPro; IPR002059; CSP_DNA-bd.
DR   InterPro; IPR012340; NA-bd_OB-fold.
DR   Pfam; PF00313; CSD; 1.
DR   PRINTS; PR00050; COLDSHOCK.
DR   SMART; SM00357; CSP; 1.
DR   SUPFAM; SSF50249; SSF50249; 1.
DR   PROSITE; PS00352; CSD_1; 1.
DR   PROSITE; PS51857; CSD_2; 1.
PE   2: Evidence at transcript level;
KW   DNA-binding; Nucleus; Reference proteome; Transcription;
KW   Transcription regulation.
FT   CHAIN           1..305
FT                   /note="B box-binding protein"
FT                   /id="PRO_0000100224"
FT   DOMAIN          39..103
FT                   /note="CSD"
FT   REGION          1..24
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          98..305
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        134..149
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        230..257
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        269..287
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   305 AA;  34485 MW;  F47F23510FCBBC7F CRC64;
     MSSEVETQEQ QPDALEGKAG QEPAATVGEK KVIATKVLGT VKWFNVRNGY GFINRNDTKE
     DVFVHQTAIK KNNPRKYLRS VGDGETVEFD VVEGEKGAEA ANVTGPGPVP VQGSKYAADR
     NNYRRYPRRR GPPRNYQQNY QNSESGEKAE GNESAPEGEG TNQQRPCPRR RYPPPFYSRR
     PYGRRPQYSN VPVQGESAEG AESQGAGEQG RPVRQNMYRG FRPQFRRGPP RQRQPREDGN
     EEDKENQGDE TQSHACHLMR RYRRNFNYRR RRPENPKPQD GKETKAAETS AENTSAPEAE
     QGGAE