ID   YB21A_YEAST             Reviewed;         438 AA.
AC   Q12260; D6VPQ5;
DT   06-MAR-2007, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   27-MAR-2024, entry version 126.
DE   RecName: Full=Transposon Ty2-B Gag polyprotein;
DE            Short=TY2A;
DE            Short=TYA;
DE            Short=Transposon Ty2 protein A;
DE   AltName: Full=A-438 protein;
DE   Contains:
DE     RecName: Full=Capsid protein;
DE              Short=CA;
DE   Contains:
DE     RecName: Full=Gag-p4;
GN   Name=TY2A-B; Synonyms=YBLWTy2-1 GAG; OrderedLocusNames=YBL100W-A;
GN   ORFNames=YBL0821, YBL101W-A;
OS   Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC   Saccharomycetales; Saccharomycetaceae; Saccharomyces.
OX   NCBI_TaxID=559292;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 204508 / S288c;
RX   PubMed=7502586; DOI=10.1002/yea.320111112;
RA   Obermaier B., Gassenhuber J., Piravandi E., Domdey H.;
RT   "Sequence analysis of a 78.6 kb segment of the left end of Saccharomyces
RT   cerevisiae chromosome II.";
RL   Yeast 11:1103-1112(1995).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 204508 / S288c;
RX   PubMed=7813418; DOI=10.1002/j.1460-2075.1994.tb06923.x;
RA   Feldmann H., Aigle M., Aljinovic G., Andre B., Baclet M.C., Barthe C.,
RA   Baur A., Becam A.-M., Biteau N., Boles E., Brandt T., Brendel M.,
RA   Brueckner M., Bussereau F., Christiansen C., Contreras R., Crouzet M.,
RA   Cziepluch C., Demolis N., Delaveau T., Doignon F., Domdey H.,
RA   Duesterhus S., Dubois E., Dujon B., El Bakkoury M., Entian K.-D.,
RA   Feuermann M., Fiers W., Fobo G.M., Fritz C., Gassenhuber J., Glansdorff N.,
RA   Goffeau A., Grivell L.A., de Haan M., Hein C., Herbert C.J.,
RA   Hollenberg C.P., Holmstroem K., Jacq C., Jacquet M., Jauniaux J.-C.,
RA   Jonniaux J.-L., Kallesoee T., Kiesau P., Kirchrath L., Koetter P.,
RA   Korol S., Liebl S., Logghe M., Lohan A.J.E., Louis E.J., Li Z.Y.,
RA   Maat M.J., Mallet L., Mannhaupt G., Messenguy F., Miosga T., Molemans F.,
RA   Mueller S., Nasr F., Obermaier B., Perea J., Pierard A., Piravandi E.,
RA   Pohl F.M., Pohl T.M., Potier S., Proft M., Purnelle B., Ramezani Rad M.,
RA   Rieger M., Rose M., Schaaff-Gerstenschlaeger I., Scherens B.,
RA   Schwarzlose C., Skala J., Slonimski P.P., Smits P.H.M., Souciet J.-L.,
RA   Steensma H.Y., Stucka R., Urrestarazu L.A., van der Aart Q.J.M.,
RA   Van Dyck L., Vassarotti A., Vetter I., Vierendeels F., Vissers S.,
RA   Wagner G., de Wergifosse P., Wolfe K.H., Zagulski M., Zimmermann F.K.,
RA   Mewes H.-W., Kleine K.;
RT   "Complete DNA sequence of yeast chromosome II.";
RL   EMBO J. 13:5795-5809(1994).
RN   [3]
RP   GENOME REANNOTATION.
RC   STRAIN=ATCC 204508 / S288c;
RX   PubMed=24374639; DOI=10.1534/g3.113.008995;
RA   Engel S.R., Dietrich F.S., Fisk D.G., Binkley G., Balakrishnan R.,
RA   Costanzo M.C., Dwight S.S., Hitz B.C., Karra K., Nash R.S., Weng S.,
RA   Wong E.D., Lloyd P., Skrzypek M.S., Miyasato S.R., Simison M., Cherry J.M.;
RT   "The reference genome sequence of Saccharomyces cerevisiae: Then and now.";
RL   G3 (Bethesda) 4:389-398(2014).
RN   [4]
RP   NOMENCLATURE.
RX   PubMed=9582191; DOI=10.1101/gr.8.5.464;
RA   Kim J.M., Vanguri S., Boeke J.D., Gabriel A., Voytas D.F.;
RT   "Transposable elements and genome organization: a comprehensive survey of
RT   retrotransposons revealed by the complete Saccharomyces cerevisiae genome
RT   sequence.";
RL   Genome Res. 8:464-478(1998).
RN   [5]
RP   REVIEW.
RX   PubMed=16093660; DOI=10.1159/000084940;
RA   Lesage P., Todeschini A.L.;
RT   "Happy together: the life and times of Ty retrotransposons and their
RT   hosts.";
RL   Cytogenet. Genome Res. 110:70-90(2005).
CC   -!- FUNCTION: Capsid protein (CA) is the structural component of the virus-
CC       like particle (VLP), forming the shell that encapsulates the
CC       retrotransposons dimeric RNA genome. The particles are assembled from
CC       trimer-clustered units and there are holes in the capsid shells that
CC       allow for the diffusion of macromolecules. CA has also nucleocapsid-
CC       like chaperone activity, promoting primer tRNA(i)-Met annealing to the
CC       multipartite primer-binding site (PBS), dimerization of Ty2 RNA and
CC       initiation of reverse transcription (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Homotrimer. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- ALTERNATIVE PRODUCTS:
CC       Event=Ribosomal frameshifting; Named isoforms=2;
CC         Comment=The Gag-Pol polyprotein is generated by a +1 ribosomal
CC         frameshift.;
CC       Name=Transposon Ty2-B Gag polyprotein;
CC         IsoId=Q12260-1; Sequence=Displayed;
CC       Name=Transposon Ty2-B Gag-Pol polyprotein;
CC         IsoId=Q12491-1; Sequence=External;
CC   -!- DOMAIN: The C-terminal RNA-binding region of CA is sufficient for all
CC       its nucleocapsid-like chaperone activities. {ECO:0000250}.
CC   -!- MISCELLANEOUS: Retrotransposons are mobile genetic entities that are
CC       able to replicate via an RNA intermediate and a reverse transcription
CC       step. In contrast to retroviruses, retrotransposons are non-infectious,
CC       lack an envelope and remain intracellular. Ty2 retrotransposons belong
CC       to the copia elements (pseudoviridae).
CC   -!- MISCELLANEOUS: [Isoform Transposon Ty2-B Gag polyprotein]: Produced by
CC       conventional translation.
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DR   EMBL; X79489; CAA55997.1; -; Genomic_DNA.
DR   EMBL; Z35861; CAA84921.1; -; Genomic_DNA.
DR   EMBL; Z35862; CAA84925.1; -; Genomic_DNA.
DR   EMBL; BK006936; DAA07025.1; -; Genomic_DNA.
DR   PIR; S45397; S45397.
DR   RefSeq; NP_009451.1; NM_001180049.1. [Q12260-1]
DR   AlphaFoldDB; Q12260; -.
DR   BioGRID; 32603; 4.
DR   DIP; DIP-8933N; -.
DR   IntAct; Q12260; 5.
DR   MINT; Q12260; -.
DR   MEROPS; A11.003; -.
DR   iPTMnet; Q12260; -.
DR   PaxDb; 4932-YBL100W-A; -.
DR   PeptideAtlas; Q12260; -.
DR   GeneID; 852174; -.
DR   KEGG; sce:YBL100W-A; -.
DR   AGR; SGD:S000002148; -.
DR   SGD; S000002148; YBL100W-A.
DR   VEuPathDB; FungiDB:YBL100W-A; -.
DR   eggNOG; KOG0017; Eukaryota.
DR   HOGENOM; CLU_045291_1_0_1; -.
DR   InParanoid; Q12260; -.
DR   OrthoDB; 2039326at2759; -.
DR   Proteomes; UP000002311; Chromosome II.
DR   RNAct; Q12260; Protein.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000943; C:retrotransposon nucleocapsid; ISS:SGD.
DR   GO; GO:0003723; F:RNA binding; ISS:SGD.
DR   GO; GO:0032197; P:retrotransposition; ISS:SGD.
DR   InterPro; IPR015820; TYA.
DR   Pfam; PF01021; TYA; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Reference proteome; Ribosomal frameshifting; RNA-binding;
KW   Transposable element.
FT   CHAIN           1..438
FT                   /note="Transposon Ty2-B Gag polyprotein"
FT                   /id="PRO_0000279275"
FT   CHAIN           1..397
FT                   /note="Capsid protein"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000279276"
FT   PEPTIDE         398..438
FT                   /note="Gag-p4"
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000279277"
FT   REGION          1..88
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          295..397
FT                   /note="RNA-binding"
FT                   /evidence="ECO:0000250"
FT   REGION          364..397
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          419..438
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        1..67
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   SITE            397..398
FT                   /note="Cleavage; by Ty2 protease"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   438 AA;  49898 MW;  381BA464909FA967 CRC64;
     MESQQLHQNP HSLHGSAYAS VTSKEVSSNQ DPLAVSASNL PEFDRDSTKV NSQQETTPGT
     SAVPENHHHV SPQPASVPPP QNGQYQQHGM MTPNKAMASN WAHYQQPSMM TCSHYQTSPA
     YYQPDPHYPL PQYIPPLSTS SPDPIDSQDQ HSEVPQAKTK VRNNVLPPHT LTSEENFYTW
     VKFYIRFLKN SNLGDIIPND QGEIKRQMTY EEHAYIYNTF QAFAPFHLLP TWVKQILEIN
     YADILTVLCK SVSKMQTNNQ ELKDWIALAN LEYDGSTSAD TFEITVSTII QRLKENNINV
     SDRLACQLIL KGLSGDFKYL RNQYRTKTNM KLSQLFAEIQ LIYDENKIMN LNKPSQYKQH
     SEYKNVSRTS PNTTNTKVTT RNYHRTNSSK PRAAKAHNIA TSSKFSRVNN DHINESTVSS
     QYLSDDNELS LRPATERI
//