ID   NUSB_NOSS1              Reviewed;         211 AA.
AC   Q8YW56;
DT   02-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   25-MAY-2022, entry version 98.
DE   RecName: Full=Transcription antitermination protein NusB {ECO:0000255|HAMAP-Rule:MF_00073};
DE   AltName: Full=Antitermination factor NusB {ECO:0000255|HAMAP-Rule:MF_00073};
GN   Name=nusB {ECO:0000255|HAMAP-Rule:MF_00073}; OrderedLocusNames=all1760;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(2001).
CC   -!- FUNCTION: Involved in transcription antitermination. Required for
CC       transcription of ribosomal RNA (rRNA) genes. Binds specifically to the
CC       boxA antiterminator sequence of the ribosomal RNA (rrn) operons.
CC       {ECO:0000255|HAMAP-Rule:MF_00073}.
CC   -!- SIMILARITY: Belongs to the NusB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00073}.
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DR   EMBL; BA000019; BAB73459.1; -; Genomic_DNA.
DR   PIR; AB2026; AB2026.
DR   RefSeq; WP_010995928.1; NZ_RSCN01000019.1.
DR   AlphaFoldDB; Q8YW56; -.
DR   SMR; Q8YW56; -.
DR   STRING; 103690.17130850; -.
DR   EnsemblBacteria; BAB73459; BAB73459; BAB73459.
DR   KEGG; ana:all1760; -.
DR   eggNOG; COG0781; Bacteria.
DR   OMA; KPQQIAR; -.
DR   OrthoDB; 1574817at2; -.
DR   Proteomes; UP000002483; Chromosome.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006353; P:DNA-templated transcription, termination; IEA:UniProtKB-UniRule.
DR   GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:InterPro.
DR   GO; GO:0031564; P:transcription antitermination; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.940.10; -; 1.
DR   HAMAP; MF_00073; NusB; 1.
DR   InterPro; IPR035926; NusB-like_sf.
DR   InterPro; IPR011605; NusB_fam.
DR   InterPro; IPR006027; NusB_RsmB_TIM44.
DR   PANTHER; PTHR11078; PTHR11078; 1.
DR   Pfam; PF01029; NusB; 1.
DR   SUPFAM; SSF48013; SSF48013; 1.
DR   TIGRFAMs; TIGR01951; nusB; 1.
PE   3: Inferred from homology;
KW   Reference proteome; RNA-binding; Transcription;
KW   Transcription antitermination; Transcription regulation.
FT   CHAIN           1..211
FT                   /note="Transcription antitermination protein NusB"
FT                   /id="PRO_0000176503"
SQ   SEQUENCE   211 AA;  23800 MW;  2DB190D14134840D CRC64;
     MQDRKPQQIA RELALLSLSQ LPLNPKKLTE EHLPKLVLAT VRTLRAEVQD TLDNAAAELQ
     RSNDRLLTSQ TRASDLNTAR NMLQEAISYT QTAINQLGAS VEFPELIQLA NQDKEVGRYA
     IKLVKIINEE RSVIDEQITS ALVDWQVTRL AQIDRDILRI AVAEMMFFNL PNSVAINEAV
     ELAKRYSGDE GHRFINGVLR RVSDQKKALS V