ID   RPC2_BP434              Reviewed;          97 AA.
AC   P03043;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   12-AUG-2020, entry version 77.
DE   RecName: Full=Regulatory protein CII;
GN   Name=CII;
OS   Enterobacteria phage 434 (Bacteriophage 434).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Siphoviridae; Lambdavirus.
OX   NCBI_TaxID=10712;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=375198; DOI=10.1093/nar/6.3.867;
RA   Grosschedl R., Schwarz E.;
RT   "Nucleotide sequence of the cro-cII-oop region of bacteriophage 434 DNA.";
RL   Nucleic Acids Res. 6:867-881(1979).
CC   -!- FUNCTION: This protein and protein CIII form a complex that is involved
CC       in the initiation of lysogeny. The complex binds at either of the cy
CC       regulatory sites preceding the CI repressor protein and integrase
CC       coding regions and induces transcription of these genes.
CC   -!- SIMILARITY: Belongs to the lambda phage CII protein family.
CC       {ECO:0000305}.
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DR   EMBL; V00635; CAA23909.1; -; Genomic_DNA.
DR   PIR; E03579; QCBP43.
DR   SMR; P03043; -.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:InterPro.
DR   Gene3D; 1.10.260.40; -; 1.
DR   InterPro; IPR010982; Lambda_DNA-bd_dom_sf.
DR   InterPro; IPR007933; Transcrpt_activ_CII.
DR   Pfam; PF05269; Phage_CII; 1.
DR   SUPFAM; SSF47413; SSF47413; 1.
PE   3: Inferred from homology;
KW   Activator; DNA-binding; Early protein; Transcription;
KW   Transcription regulation.
FT   CHAIN           1..97
FT                   /note="Regulatory protein CII"
FT                   /id="PRO_0000077591"
FT   DNA_BIND        26..45
FT                   /note="H-T-H motif"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   97 AA;  11072 MW;  AF4E0428E693B808 CRC64;
     MVRANKRNEA LRIESALLNK IAMLGTEKTA EAVGVDKSQI SRWKRDWIPK FSMLLAVLEW
     GVVDDDMARL ARQVASILTN KKRPAATERS EQIQMEF