ID   PRIS_SULIK              Reviewed;         330 AA.
AC   C4KGQ2;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   07-JUL-2009, sequence version 1.
DT   03-AUG-2022, entry version 56.
DE   RecName: Full=DNA primase small subunit PriS {ECO:0000255|HAMAP-Rule:MF_00700};
DE            EC=2.7.7.- {ECO:0000255|HAMAP-Rule:MF_00700};
GN   Name=priS {ECO:0000255|HAMAP-Rule:MF_00700}; Synonyms=priA;
GN   OrderedLocusNames=M164_1162;
OS   Sulfolobus islandicus (strain M.16.4 / Kamchatka #3).
OC   Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Sulfolobus.
OX   NCBI_TaxID=426118;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=M.16.4 / Kamchatka #3;
RX   PubMed=19435847; DOI=10.1073/pnas.0808945106;
RA   Reno M.L., Held N.L., Fields C.J., Burke P.V., Whitaker R.J.;
RT   "Biogeography of the Sulfolobus islandicus pan-genome.";
RL   Proc. Natl. Acad. Sci. U.S.A. 106:8605-8610(2009).
CC   -!- FUNCTION: Catalytic subunit of DNA primase, an RNA polymerase that
CC       catalyzes the synthesis of short RNA molecules used as primers for DNA
CC       polymerase during DNA replication. The small subunit contains the
CC       primase catalytic core and has DNA synthesis activity on its own.
CC       Binding to the large subunit stabilizes and modulates the activity,
CC       increasing the rate of DNA synthesis while decreasing the length of the
CC       DNA fragments, and conferring RNA synthesis capability. The DNA
CC       polymerase activity may enable DNA primase to also catalyze primer
CC       extension after primer synthesis. May also play a role in DNA repair.
CC       {ECO:0000255|HAMAP-Rule:MF_00700}.
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00700};
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00700};
CC   -!- SUBUNIT: Heterodimer of a small subunit (PriS) and a large subunit
CC       (PriL). {ECO:0000255|HAMAP-Rule:MF_00700}.
CC   -!- SIMILARITY: Belongs to the eukaryotic-type primase small subunit
CC       family. {ECO:0000255|HAMAP-Rule:MF_00700}.
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DR   EMBL; CP001402; ACR41766.1; -; Genomic_DNA.
DR   RefSeq; WP_012735911.1; NC_012726.1.
DR   AlphaFoldDB; C4KGQ2; -.
DR   SMR; C4KGQ2; -.
DR   EnsemblBacteria; ACR41766; ACR41766; M164_1162.
DR   GeneID; 7939986; -.
DR   KEGG; sid:M164_1162; -.
DR   HOGENOM; CLU_056123_0_0_2; -.
DR   OMA; GYHVHVR; -.
DR   Proteomes; UP000001479; Chromosome.
DR   GO; GO:0000428; C:DNA-directed RNA polymerase complex; IEA:UniProtKB-KW.
DR   GO; GO:1990077; C:primosome complex; IEA:UniProtKB-KW.
DR   GO; GO:0003896; F:DNA primase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   CDD; cd04860; AE_Prim_S; 1.
DR   HAMAP; MF_00700; DNA_primase_sml_arc; 1.
DR   InterPro; IPR014052; DNA_primase_ssu_euk/arc.
DR   InterPro; IPR023639; DNA_primase_ssu_PriS.
DR   PANTHER; PTHR10536; PTHR10536; 1.
PE   3: Inferred from homology;
KW   DNA replication; DNA-directed RNA polymerase; Magnesium; Manganese;
KW   Metal-binding; Nucleotidyltransferase; Primosome; Transcription;
KW   Transferase; Zinc.
FT   CHAIN           1..330
FT                   /note="DNA primase small subunit PriS"
FT                   /id="PRO_1000212637"
FT   ACT_SITE        101
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00700"
FT   ACT_SITE        103
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00700"
FT   ACT_SITE        235
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00700"
FT   BINDING         116
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
FT   BINDING         119
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
FT   BINDING         128
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
FT   BINDING         131
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   330 AA;  37377 MW;  300AB58FED20B69F CRC64;
     MGTFTLHQGQ SNLIKSFFRN YYLNAELGLP NDMELREFAL QPFGSDTYIR HLSFSSSEEL
     RDYLVNRNLP LHLFYSSARY QLPGARDMEE KAWMGSDLLF DIDADHICKL RSIRFCPVCG
     NAITSEKCER DNVETLEYVE MTSECIKRGL EEARNLVEIL EDDFGLKPKV YFSGNRGFHV
     QVDCYGDCAL LDSDERKEIA EYVMGVGVPS YPGGGENAPG WVGRKNRGIN GVTIDGQVTI
     DVKRLIRIPN SLHGKSGLIV KEVTNLDDFE FNEALSPFTG YTIFLPYISI ETEVLSRNIK
     LNRGVPIKIE SSIGIYLHLK NLGEVKAYVR