位置:首页 > 蛋白库 > CSM4_STRTR
CSM4_STRTR
ID   CSM4_STRTR              Reviewed;         299 AA.
AC   A0A0A7HGA1;
DT   10-APR-2019, integrated into UniProtKB/Swiss-Prot.
DT   04-MAR-2015, sequence version 1.
DT   25-MAY-2022, entry version 31.
DE   RecName: Full=CRISPR system Cms protein Csm4;
DE   AltName: Full=CRISPR type III A-associated RAMP protein Csm4;
GN   Name=csm4 {ECO:0000303|PubMed:25458845};
OS   Streptococcus thermophilus.
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=1308;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], FUNCTION IN PHAGE RESISTANCE, TARGETS
RP   SSRNA, SUBUNIT, AND ANTIVIRAL DEFENSE.
RC   STRAIN=DGCC8004;
RX   PubMed=25458845; DOI=10.1016/j.molcel.2014.09.027;
RA   Tamulaitis G., Kazlauskiene M., Manakova E., Venclovas C., Nwokeoji A.O.,
RA   Dickman M.J., Horvath P., Siksnys V.;
RT   "Programmable RNA shredding by the type III-A CRISPR-Cas system of
RT   Streptococcus thermophilus.";
RL   Mol. Cell 56:506-517(2014).
RN   [2]
RP   FUNCTION, AND SUBUNIT.
RC   STRAIN=DGCC8004;
RX   PubMed=27105119; DOI=10.1016/j.molcel.2016.03.024;
RA   Kazlauskiene M., Tamulaitis G., Kostiuk G., Venclovas C., Siksnys V.;
RT   "Spatiotemporal control of type III-A CRISPR-Cas immunity: coupling DNA
RT   degradation with the target RNA recognition.";
RL   Mol. Cell 62:295-306(2016).
RN   [3]
RP   SUBUNIT.
RC   STRAIN=DGCC8004;
RX   PubMed=28663439; DOI=10.1126/science.aao0100;
RA   Kazlauskiene M., Kostiuk G., Venclovas C., Tamulaitis G., Siksnys V.;
RT   "A cyclic oligonucleotide signaling pathway in type III CRISPR-Cas
RT   systems.";
RL   Science 357:605-609(2017).
CC   -!- FUNCTION: CRISPR (clustered regularly interspaced short palindromic
CC       repeat) is an adaptive immune system that provides protection against
CC       mobile genetic elements (viruses, transposable elements and conjugative
CC       plasmids). CRISPR clusters contain spacers, sequences complementary to
CC       antecedent mobile elements, and target invading nucleic acids. CRISPR
CC       clusters are transcribed and processed into CRISPR RNA (crRNA). The
CC       type III-A Csm effector complex binds crRNA and acts as a crRNA-guided
CC       RNase, DNase and cyclic oligoadenylate synthase; binding of target RNA
CC       cognate to the crRNA is required for all activities. In a heterologous
CC       host this Csm effector complex restricts ssRNA phage MS2, suggesting it
CC       may target RNA viruses in vivo. {ECO:0000269|PubMed:25458845}.
CC   -!- FUNCTION: Csm functions as a non-specific ssDNase. Base-pairing between
CC       crRNA and target RNA to form a ternary Csm complex activates a ssDNase
CC       activity; target RNA cleavage suppresses the ssDNase, a temporal
CC       control that prevents uncontrolled DNA degradation. Viral RNA
CC       transcripts probably tether the Csm complex to the viral genome,
CC       recruiting Cas10 ssDNA activity which is able to degrade DNA in the
CC       transcription bubble, spatially controlling the DNase activity.
CC       {ECO:0000269|PubMed:27105119}.
CC   -!- FUNCTION: The subunit probably binds to the 5' handle of the crRNA,
CC       helping in discrimination between self- and non-self.
CC       {ECO:0000305|PubMed:27105119}.
CC   -!- SUBUNIT: Part of the Csm effector complex that includes at least
CC       Cas10(1), Csm2(3), Csm3(5), Csm4(1), Csm5(1) and mature crRNA
CC       (PubMed:25458845, PubMed:27105119, PubMed:28663439). The Csm complex is
CC       elongated and slightly twisted with a maximal length of 215 Angstroms
CC       and a diameter of 75-80 Angstroms (PubMed:25458845). It has been
CC       modeled to have a central protein filamant of Csm3 subunits along which
CC       the dsRNA helix of paired crRNA and target RNA binds. The filament is
CC       capped at one end by Cas10 and Csm4 and at the other end by Csm5; ssDNA
CC       is thought to bind to the N-terminal HD domain of Cas10 (Probable). Csm
CC       with a precursor crRNA does not include Csm5, while Cas6, the enzyme
CC       probably involved in pre-crRNA processing, is found associated with a
CC       subset of the Csm complex (PubMed:25458845).
CC       {ECO:0000269|PubMed:25458845, ECO:0000269|PubMed:27105119,
CC       ECO:0000269|PubMed:28663439, ECO:0000305|PubMed:25458845,
CC       ECO:0000305|PubMed:27105119}.
CC   -!- MISCELLANEOUS: Encoded in a type III-A CRISPR locus.
CC       {ECO:0000269|PubMed:25458845}.
CC   -!- SIMILARITY: Belongs to the CRISPR-associated Csm4 family.
CC       {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; KM222358; AIZ03607.1; -; Genomic_DNA.
DR   RefSeq; WP_002950684.1; NZ_QFLC01000003.1.
DR   PDB; 6NUD; EM; 3.50 A; I=1-299.
DR   PDB; 6NUE; EM; 3.30 A; I=1-299.
DR   PDBsum; 6NUD; -.
DR   PDBsum; 6NUE; -.
DR   AlphaFoldDB; A0A0A7HGA1; -.
DR   SMR; A0A0A7HGA1; -.
DR   STRING; 322159.STER_0976; -.
DR   EnsemblBacteria; POO15347; POO15347; CDA68_00841.
DR   PATRIC; fig|1308.45.peg.984; -.
DR   eggNOG; COG1567; Bacteria.
DR   OMA; ACCHEIS; -.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0051607; P:defense response to virus; IEA:UniProtKB-KW.
DR   InterPro; IPR005510; Csm4.
DR   InterPro; IPR040932; Csm4_C.
DR   Pfam; PF17953; Csm4_C; 1.
DR   TIGRFAMs; TIGR01903; cas5_csm4; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Antiviral defense; RNA-binding.
FT   CHAIN           1..299
FT                   /note="CRISPR system Cms protein Csm4"
FT                   /id="PRO_0000446121"
FT   STRAND          4..9
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          11..13
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          17..21
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   HELIX           30..43
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   HELIX           46..53
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          55..57
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          64..73
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   TURN            81..83
FT                   /evidence="ECO:0007829|PDB:6NUD"
FT   HELIX           90..101
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          105..110
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   TURN            111..113
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   HELIX           114..117
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          126..134
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   TURN            136..140
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          142..150
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          155..160
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   HELIX           166..169
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   TURN            170..172
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   HELIX           173..175
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   TURN            182..187
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          190..192
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          199..201
FT                   /evidence="ECO:0007829|PDB:6NUE"
FT   STRAND          204..207
FT                   /evidence="ECO:0007829|PDB:6NUD"
FT   STRAND          222..224
FT                   /evidence="ECO:0007829|PDB:6NUD"
FT   HELIX           226..229
FT                   /evidence="ECO:0007829|PDB:6NUE"
SQ   SEQUENCE   299 AA;  33748 MW;  46B6F8376285FDA5 CRC64;
     MTYKLYIMTF QNAHFGSGTL DSSKLTFSAD RIFSALVLES LKMGKLDAFL AEANQDKFTL
     TDAFPFQFGP FLPKPIGYPK HDQIDQSVDV KEVRRQAKLS KKLQFLALEN VDDYLNGELF
     ENEEHAVIDT VTKNQPHKDG NLYQVATTRF SNDTSLYVIA NESDLLNELM SSLQYSGLGG
     KRSSGFGRFE LDIQNIPLEL SDRLTKNHSD KVMSLTTALP VDADLEEAME DGHYLLTKSS
     GFAFSHATNE NYRKQDLYKF ASGSTFSKTF EGQIVDVRPL DFPHAVLNYA KPLFFKLEV
 
 
维奥蛋白资源库 - 中文蛋白资源 CopyRight © 2010-2024