ID   EX7S_NOSS1              Reviewed;          82 AA.
AC   Q8YW43;
DT   27-MAR-2002, integrated into UniProtKB/Swiss-Prot.
DT   27-MAR-2002, sequence version 1.
DT   25-MAY-2022, entry version 92.
DE   RecName: Full=Exodeoxyribonuclease 7 small subunit {ECO:0000255|HAMAP-Rule:MF_00337};
DE            EC=3.1.11.6 {ECO:0000255|HAMAP-Rule:MF_00337};
DE   AltName: Full=Exodeoxyribonuclease VII small subunit {ECO:0000255|HAMAP-Rule:MF_00337};
DE            Short=Exonuclease VII small subunit {ECO:0000255|HAMAP-Rule:MF_00337};
GN   Name=xseB {ECO:0000255|HAMAP-Rule:MF_00337}; OrderedLocusNames=asl1773;
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: Bidirectionally degrades single-stranded DNA into large acid-
CC       insoluble oligonucleotides, which are then degraded further into small
CC       acid-soluble oligonucleotides. {ECO:0000255|HAMAP-Rule:MF_00337}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Exonucleolytic cleavage in either 5'- to 3'- or 3'- to 5'-
CC         direction to yield nucleoside 5'-phosphates.; EC=3.1.11.6;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00337};
CC   -!- SUBUNIT: Heterooligomer composed of large and small subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00337}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00337}.
CC   -!- SIMILARITY: Belongs to the XseB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00337, ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAB73472.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; BA000019; BAB73472.1; ALT_INIT; Genomic_DNA.
DR   PIR; AG2027; AG2027.
DR   RefSeq; WP_044521062.1; NZ_RSCN01000019.1.
DR   AlphaFoldDB; Q8YW43; -.
DR   SMR; Q8YW43; -.
DR   STRING; 103690.17130863; -.
DR   EnsemblBacteria; BAB73472; BAB73472; BAB73472.
DR   KEGG; ana:asl1773; -.
DR   eggNOG; COG1722; Bacteria.
DR   OMA; VFEQFAN; -.
DR   OrthoDB; 2057189at2; -.
DR   Proteomes; UP000002483; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0009318; C:exodeoxyribonuclease VII complex; IEA:InterPro.
DR   GO; GO:0008855; F:exodeoxyribonuclease VII activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006308; P:DNA catabolic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.287.1040; -; 1.
DR   HAMAP; MF_00337; Exonuc_7_S; 1.
DR   InterPro; IPR003761; Exonuc_VII_S.
DR   InterPro; IPR037004; Exonuc_VII_ssu_sf.
DR   Pfam; PF02609; Exonuc_VII_S; 1.
DR   PIRSF; PIRSF006488; Exonuc_VII_S; 1.
DR   SUPFAM; SSF116842; SSF116842; 1.
DR   TIGRFAMs; TIGR01280; xseB; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Exonuclease; Hydrolase; Nuclease; Reference proteome.
FT   CHAIN           1..82
FT                   /note="Exodeoxyribonuclease 7 small subunit"
FT                   /id="PRO_0000206912"
SQ   SEQUENCE   82 AA;  9436 MW;  A65E8DC8B4D543F6 CRC64;
     MVKRKNSDNS DTVAHGNYEA KVAEIEAIIS RIESGELELE AVFEQFANAV EYLRQCDTFL
     QQRQQQMDLL IETLNDEDNS EL