ID   DPO4_LISMC              Reviewed;         356 AA.
AC   C1KWR9;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   26-MAY-2009, sequence version 1.
DT   03-AUG-2022, entry version 64.
DE   RecName: Full=DNA polymerase IV {ECO:0000255|HAMAP-Rule:MF_01113};
DE            Short=Pol IV {ECO:0000255|HAMAP-Rule:MF_01113};
DE            EC=2.7.7.7 {ECO:0000255|HAMAP-Rule:MF_01113};
GN   Name=dinB {ECO:0000255|HAMAP-Rule:MF_01113}; OrderedLocusNames=Lm4b_01987;
OS   Listeria monocytogenes serotype 4b (strain CLIP80459).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Listeriaceae; Listeria.
OX   NCBI_TaxID=568819;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CLIP80459;
RX   PubMed=22530965; DOI=10.1186/1471-2164-13-144;
RA   Hain T., Ghai R., Billion A., Kuenne C.T., Steinweg C., Izar B.,
RA   Mohamed W., Mraheil M., Domann E., Schaffrath S., Karst U., Goesmann A.,
RA   Oehm S., Puhler A., Merkl R., Vorwerk S., Glaser P., Garrido P.,
RA   Rusniok C., Buchrieser C., Goebel W., Chakraborty T.;
RT   "Comparative genomics and transcriptomics of lineages I, II, and III
RT   strains of Listeria monocytogenes.";
RL   BMC Genomics 13:144-144(2012).
CC   -!- FUNCTION: Poorly processive, error-prone DNA polymerase involved in
CC       untargeted mutagenesis. Copies undamaged DNA at stalled replication
CC       forks, which arise in vivo from mismatched or misaligned primer ends.
CC       These misaligned primers can be extended by PolIV. Exhibits no 3'-5'
CC       exonuclease (proofreading) activity. May be involved in translesional
CC       synthesis, in conjunction with the beta clamp from PolIII.
CC       {ECO:0000255|HAMAP-Rule:MF_01113}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC         diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC         Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC         ChEBI:CHEBI:173112; EC=2.7.7.7; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01113};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01113};
CC       Note=Binds 2 magnesium ions per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_01113};
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_01113}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01113}.
CC   -!- SIMILARITY: Belongs to the DNA polymerase type-Y family.
CC       {ECO:0000255|HAMAP-Rule:MF_01113}.
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DR   EMBL; FM242711; CAS05744.1; -; Genomic_DNA.
DR   RefSeq; WP_003725867.1; NC_012488.1.
DR   AlphaFoldDB; C1KWR9; -.
DR   SMR; C1KWR9; -.
DR   KEGG; lmc:Lm4b_01987; -.
DR   HOGENOM; CLU_012348_1_2_9; -.
DR   OMA; KVRRYDF; -.
DR   BioCyc; LMON568819:LM4B_RS10040-MON; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003684; F:damaged DNA binding; IEA:InterPro.
DR   GO; GO:0003887; F:DNA-directed DNA polymerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006281; P:DNA repair; IEA:UniProtKB-UniRule.
DR   GO; GO:0006261; P:DNA-templated DNA replication; IEA:UniProtKB-UniRule.
DR   GO; GO:0009432; P:SOS response; IEA:UniProt.
DR   CDD; cd03586; PolY_Pol_IV_kappa; 1.
DR   Gene3D; 3.30.1490.100; -; 1.
DR   Gene3D; 3.30.70.270; -; 1.
DR   HAMAP; MF_01113; DNApol_IV; 1.
DR   InterPro; IPR043502; DNA/RNA_pol_sf.
DR   InterPro; IPR036775; DNA_pol_Y-fam_lit_finger_sf.
DR   InterPro; IPR017961; DNA_pol_Y-fam_little_finger.
DR   InterPro; IPR022880; DNApol_IV.
DR   InterPro; IPR024728; PolY_HhH_motif.
DR   InterPro; IPR043128; Rev_trsase/Diguanyl_cyclase.
DR   InterPro; IPR001126; UmuC.
DR   Pfam; PF00817; IMS; 1.
DR   Pfam; PF11799; IMS_C; 1.
DR   Pfam; PF11798; IMS_HHH; 1.
DR   SUPFAM; SSF100879; SSF100879; 1.
DR   SUPFAM; SSF56672; SSF56672; 1.
DR   PROSITE; PS50173; UMUC; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; DNA damage; DNA repair; DNA replication; DNA-binding;
KW   DNA-directed DNA polymerase; Magnesium; Metal-binding; Mutator protein;
KW   Nucleotidyltransferase; Transferase.
FT   CHAIN           1..356
FT                   /note="DNA polymerase IV"
FT                   /id="PRO_1000213589"
FT   DOMAIN          7..188
FT                   /note="UmuC"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01113"
FT   ACT_SITE        107
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01113"
FT   BINDING         11
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01113"
FT   BINDING         106
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01113"
FT   SITE            16
FT                   /note="Substrate discrimination"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01113"
SQ   SEQUENCE   356 AA;  40522 MW;  E8ECA5992BF7D55C CRC64;
     MDTSRKIIHI DMDAFYASVE QRDHPEFRGK PLIIGGDPNK RGVVATCSYE ARKFGVHSAM
     PTRQAAKLCP NGIFIHGNMA HYVEVSNQIR EIFSRYTDII EPLSLDEAYL DVTENKKGMK
     SATMVAREIQ QTIYQELGLT ASAGVSFNKF IAKIASDFKK PAGITVVTPE EAEAFLEQIP
     VTKFYGVGKV TAEKLHRLGI ETGADLKKWS EWDLIRELHK HGYHLYRHVR GRSNNIVNPH
     RDRKSVGKET TFEFNVLDSR VLEQSLMQFA KKVEERLIKL QKHGKTVVLK LRYSDFTTIT
     KRLTLNEYTN DASQIYQAAA LLLRESYTGQ DSIRLIGLTV TNLKPVYFEN LRLEGL