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DDX20_DICDI
ID   DDX20_DICDI             Reviewed;         849 AA.
AC   Q54ZI9; Q8MYE9;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 2.
DT   03-AUG-2022, entry version 104.
DE   RecName: Full=Probable ATP-dependent RNA helicase ddx20;
DE            EC=3.6.4.13;
DE   AltName: Full=DEAD box protein 20;
GN   Name=ddx20; ORFNames=DDB_G0277527;
OS   Dictyostelium discoideum (Slime mold).
OC   Eukaryota; Amoebozoa; Evosea; Eumycetozoa; Dictyostelia; Dictyosteliales;
OC   Dictyosteliaceae; Dictyostelium.
OX   NCBI_TaxID=44689;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AX4;
RX   PubMed=12097910; DOI=10.1038/nature00847;
RA   Gloeckner G., Eichinger L., Szafranski K., Pachebat J.A., Bankier A.T.,
RA   Dear P.H., Lehmann R., Baumgart C., Parra G., Abril J.F., Guigo R.,
RA   Kumpf K., Tunggal B., Cox E.C., Quail M.A., Platzer M., Rosenthal A.,
RA   Noegel A.A.;
RT   "Sequence and analysis of chromosome 2 of Dictyostelium discoideum.";
RL   Nature 418:79-85(2002).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AX4;
RX   PubMed=15875012; DOI=10.1038/nature03481;
RA   Eichinger L., Pachebat J.A., Gloeckner G., Rajandream M.A., Sucgang R.,
RA   Berriman M., Song J., Olsen R., Szafranski K., Xu Q., Tunggal B.,
RA   Kummerfeld S., Madera M., Konfortov B.A., Rivero F., Bankier A.T.,
RA   Lehmann R., Hamlin N., Davies R., Gaudet P., Fey P., Pilcher K., Chen G.,
RA   Saunders D., Sodergren E.J., Davis P., Kerhornou A., Nie X., Hall N.,
RA   Anjard C., Hemphill L., Bason N., Farbrother P., Desany B., Just E.,
RA   Morio T., Rost R., Churcher C.M., Cooper J., Haydock S., van Driessche N.,
RA   Cronin A., Goodhead I., Muzny D.M., Mourier T., Pain A., Lu M., Harper D.,
RA   Lindsay R., Hauser H., James K.D., Quiles M., Madan Babu M., Saito T.,
RA   Buchrieser C., Wardroper A., Felder M., Thangavelu M., Johnson D.,
RA   Knights A., Loulseged H., Mungall K.L., Oliver K., Price C., Quail M.A.,
RA   Urushihara H., Hernandez J., Rabbinowitsch E., Steffen D., Sanders M.,
RA   Ma J., Kohara Y., Sharp S., Simmonds M.N., Spiegler S., Tivey A.,
RA   Sugano S., White B., Walker D., Woodward J.R., Winckler T., Tanaka Y.,
RA   Shaulsky G., Schleicher M., Weinstock G.M., Rosenthal A., Cox E.C.,
RA   Chisholm R.L., Gibbs R.A., Loomis W.F., Platzer M., Kay R.R.,
RA   Williams J.G., Dear P.H., Noegel A.A., Barrell B.G., Kuspa A.;
RT   "The genome of the social amoeba Dictyostelium discoideum.";
RL   Nature 435:43-57(2005).
CC   -!- FUNCTION: The SMN complex catalyzes the assembly of small nuclear
CC       ribonucleoproteins (snRNPs), the building blocks of the spliceosome,
CC       and thereby plays an important role in the splicing of cellular pre-
CC       mRNAs. Most spliceosomal snRNPs contain a common set of Sm proteins
CC       SNRPB, SNRPD1, SNRPD2, SNRPD3, SNRPE, SNRPF and SNRPG that assemble in
CC       a heptameric protein ring on the Sm site of the small nuclear RNA to
CC       form the core snRNP (Sm core). In the cytosol, the Sm proteins SNRPD1,
CC       SNRPD2, SNRPE, SNRPF and SNRPG are trapped in an inactive 6S pICln-Sm
CC       complex by the chaperone CLNS1A that controls the assembly of the core
CC       snRNP. To assemble core snRNPs, the SMN complex accepts the trapped 5Sm
CC       proteins from CLNS1A forming an intermediate. Binding of snRNA inside
CC       5Sm triggers eviction of the SMN complex, thereby allowing binding of
CC       SNRPD3 and SNRPB to complete assembly of the core snRNP. May also play
CC       a role in the metabolism of small nucleolar ribonucleoprotein (snoRNPs)
CC       (By similarity). {ECO:0000250|UniProtKB:Q9UHI6}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + H2O = ADP + H(+) + phosphate; Xref=Rhea:RHEA:13065,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:456216; EC=3.6.4.13;
CC   -!- SUBUNIT: Part of the core SMN complex. {ECO:0000250|UniProtKB:Q9UHI6}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:Q9UHI6}. Nucleus
CC       {ECO:0000250|UniProtKB:Q9UHI6}.
CC   -!- DOMAIN: The Q motif is unique to and characteristic of the DEAD box
CC       family of RNA helicases and controls ATP binding and hydrolysis.
CC   -!- SIMILARITY: Belongs to the DEAD box helicase family. DDX20 subfamily.
CC       {ECO:0000305}.
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DR   EMBL; AAFI02000020; EAL68726.2; -; Genomic_DNA.
DR   RefSeq; XP_642653.2; XM_637561.2.
DR   AlphaFoldDB; Q54ZI9; -.
DR   SMR; Q54ZI9; -.
DR   STRING; 44689.DDB0266359; -.
DR   PaxDb; Q54ZI9; -.
DR   EnsemblProtists; EAL68726; EAL68726; DDB_G0277527.
DR   GeneID; 8621069; -.
DR   KEGG; ddi:DDB_G0277527; -.
DR   dictyBase; DDB_G0277527; ddx20.
DR   eggNOG; KOG4284; Eukaryota.
DR   HOGENOM; CLU_336009_0_0_1; -.
DR   InParanoid; Q54ZI9; -.
DR   OMA; DYHYENQ; -.
DR   PhylomeDB; Q54ZI9; -.
DR   PRO; PR:Q54ZI9; -.
DR   Proteomes; UP000002195; Chromosome 2.
DR   GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR   GO; GO:0032797; C:SMN complex; IBA:GO_Central.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0016887; F:ATP hydrolysis activity; IEA:RHEA.
DR   GO; GO:0003723; F:RNA binding; IBA:GO_Central.
DR   GO; GO:0003724; F:RNA helicase activity; IBA:GO_Central.
DR   GO; GO:0000387; P:spliceosomal snRNP assembly; IBA:GO_Central.
DR   Gene3D; 3.40.50.300; -; 2.
DR   InterPro; IPR011545; DEAD/DEAH_box_helicase_dom.
DR   InterPro; IPR014001; Helicase_ATP-bd.
DR   InterPro; IPR001650; Helicase_C.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR000629; RNA-helicase_DEAD-box_CS.
DR   InterPro; IPR014014; RNA_helicase_DEAD_Q_motif.
DR   Pfam; PF00270; DEAD; 1.
DR   Pfam; PF00271; Helicase_C; 1.
DR   SMART; SM00487; DEXDc; 1.
DR   SMART; SM00490; HELICc; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   PROSITE; PS00039; DEAD_ATP_HELICASE; 1.
DR   PROSITE; PS51192; HELICASE_ATP_BIND_1; 1.
DR   PROSITE; PS51194; HELICASE_CTER; 1.
DR   PROSITE; PS51195; Q_MOTIF; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Helicase; Hydrolase; mRNA processing;
KW   mRNA splicing; Nucleotide-binding; Nucleus; Reference proteome.
FT   CHAIN           1..849
FT                   /note="Probable ATP-dependent RNA helicase ddx20"
FT                   /id="PRO_0000327408"
FT   DOMAIN          86..319
FT                   /note="Helicase ATP-binding"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00541"
FT   DOMAIN          355..499
FT                   /note="Helicase C-terminal"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00542"
FT   REGION          9..39
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          480..504
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          572..644
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          667..737
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          761..817
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOTIF           55..83
FT                   /note="Q motif"
FT   MOTIF           255..258
FT                   /note="DEAD box"
FT   COMPBIAS        579..594
FT                   /note="Acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        625..644
FT                   /note="Acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         77
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250"
FT   BINDING         82
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000250"
FT   BINDING         99..106
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00541"
FT   BINDING         102..107
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00541"
SQ   SEQUENCE   849 AA;  99148 MW;  B09D06FE41403C0A CRC64;
     MKNKILFSFS NPMNSNSSNN IENNNNSNNN NNNFKNNFKN FSRKRTNDIE IEDNITFSEL
     LLQKEVLKGL EDGGYQRPSP IQLKAIPLGI SGVDLIAQAK SGTGKTIVFG VIALECVLRE
     SKLLRQKQEL NKTQLTNQTN KQLLEMDDDT YVETMVGIIR KPLVLIIAPT REIAVQIKDV
     IKSISKYCKR IKCEVFIGGL NSNNNKDENN NNILNNEDVN RLNGTQIIVG TPGKIKSLIE
     NLHLRTDTLK MVIMDEADKL LDASFSKTIN WIYSAIGNGN SNKNNSSSGS GIQMLAFSAT
     YPSYLINLLK LYMNNENLVE IRLCSDTPSL EGIKQYYQIF RNDFTENNYK TFQNKCKSLV
     LVLEQVSFYQ AIIFCNHKIR GEELTRQLNR EGWPTAFIAG GQNQKDRLST MSALKSFNIR
     ILVSTDLISR GIDVERVNLV INLDLPKDHE TYFHRIGRTG RFGTYGVSIT FINMKSIQQQ
     QQQQQQQQQQ IENENENENN NNNEGFQEID FINQLIQEYS VDITERVDND IIPEELYSYQ
     LSNPNDQQSL ANLKLKQQQT ILLNKQLEEL KINENENENQ YQNEDEEEEQ EEDDYHYENQ
     HQNEDEEEEQ EEDDYHYENQ HQNEEEEQEQ QEEDDDNYNY ENDNDSEEYE FIDDSIIEQT
     EYYYLNSNNN NNNNKNKYGN TINNNHYRNS SFNGPKNSIN NNKFKNKNIN NNDQRNSQSN
     GIKKKVNTNN NNFYPHYYNN PYPQNYYYDY QYFSDNSYYN NNYNNNNNNN NNNNNNNNNN
     NNNNNNNNNN NNNNNNNNNN NNNNNNNYYQ QHGNNPYGYN IPNSIQYSSN QFYYCTCPNC
     PTMNYHQYI
 
 
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