ID   DAD1_DICDI              Reviewed;         120 AA.
AC   Q54FB6;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   24-MAY-2005, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 2;
DE            Short=Oligosaccharyl transferase subunit 2;
GN   Name=ost2; ORFNames=DDB_G0291049;
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=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: Subunit of the oligosaccharyl transferase (OST) complex that
CC       catalyzes the initial transfer of a defined glycan
CC       (Glc(3)Man(9)GlcNAc(2) in eukaryotes) from the lipid carrier dolichol-
CC       pyrophosphate to an asparagine residue within an Asn-X-Ser/Thr
CC       consensus motif in nascent polypeptide chains, the first step in
CC       protein N-glycosylation. N-glycosylation occurs cotranslationally and
CC       the complex associates with the Sec61 complex at the channel-forming
CC       translocon complex that mediates protein translocation across the
CC       endoplasmic reticulum (ER). All subunits are required for a maximal
CC       enzyme activity. {ECO:0000250|UniProtKB:P46964}.
CC   -!- PATHWAY: Protein modification; protein glycosylation.
CC   -!- SUBUNIT: Component of the oligosaccharyltransferase (OST) complex.
CC       {ECO:0000250|UniProtKB:P46964}.
CC   -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane {ECO:0000250};
CC       Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the DAD/OST2 family. {ECO:0000305}.
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DR   EMBL; AAFI02000174; EAL61955.1; -; Genomic_DNA.
DR   RefSeq; XP_635421.1; XM_630329.1.
DR   AlphaFoldDB; Q54FB6; -.
DR   SMR; Q54FB6; -.
DR   STRING; 44689.DDB0233175; -.
DR   PaxDb; Q54FB6; -.
DR   EnsemblProtists; EAL61955; EAL61955; DDB_G0291049.
DR   GeneID; 8627922; -.
DR   KEGG; ddi:DDB_G0291049; -.
DR   dictyBase; DDB_G0291049; ost2.
DR   eggNOG; KOG1746; Eukaryota.
DR   HOGENOM; CLU_111220_2_1_1; -.
DR   InParanoid; Q54FB6; -.
DR   OMA; FIFAHII; -.
DR   PhylomeDB; Q54FB6; -.
DR   UniPathway; UPA00378; -.
DR   PRO; PR:Q54FB6; -.
DR   Proteomes; UP000002195; Chromosome 5.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0008250; C:oligosaccharyltransferase complex; ISS:dictyBase.
DR   GO; GO:0006487; P:protein N-linked glycosylation; ISS:dictyBase.
DR   InterPro; IPR003038; DAD/Ost2.
DR   PANTHER; PTHR10705; PTHR10705; 1.
DR   Pfam; PF02109; DAD; 1.
DR   PIRSF; PIRSF005588; DAD; 1.
PE   3: Inferred from homology;
KW   Endoplasmic reticulum; Membrane; Reference proteome; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..120
FT                   /note="Dolichyl-diphosphooligosaccharide--protein
FT                   glycosyltransferase subunit 2"
FT                   /id="PRO_0000327672"
FT   TOPO_DOM        1..36
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        37..57
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        58..60
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        61..81
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        82..99
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        100..120
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   120 AA;  13471 MW;  7ED4F91B7E2E801A CRC64;
     MSTTASTSSN NLTFTSIVKS FFESYSKTPQ KLKIIDLFLI YTFITGVIVF TYCCLVGTYP
     FNSFLAAFIS TVGCFVLTVC LRIQINPINN FGKTISIERA FTDYLLCNLI LHLVVFNFLG