ID   SECY_DIALT              Reviewed;         419 AA.
AC   P28540;
DT   01-DEC-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 2.
DT   25-MAY-2022, entry version 89.
DE   RecName: Full=Protein translocase subunit SecY {ECO:0000255|HAMAP-Rule:MF_01465};
GN   Name=secY {ECO:0000255|HAMAP-Rule:MF_01465};
OS   Diacronema lutheri (Unicellular marine alga) (Monochrysis lutheri).
OG   Plastid; Chloroplast.
OC   Eukaryota; Haptista; Haptophyta; Pavlovales; Pavlovaceae; Diacronema.
OX   NCBI_TaxID=2081491;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1618309; DOI=10.1016/0014-5793(92)80601-c;
RA   Scaramuzzi C.D., Stokes H.W., Hiller R.G.;
RT   "Characterisation of a chloroplast-encoded secY homologue and atpH from a
RT   chromophytic alga. Evidence for a novel chloroplast genome organisation.";
RL   FEBS Lett. 304:119-123(1992).
CC   -!- FUNCTION: The central subunit of the protein translocation channel
CC       SecYE. Consists of two halves formed by TMs 1-5 and 6-10. These two
CC       domains form a lateral gate at the front which open onto the bilayer
CC       between TMs 2 and 7, and are clamped together by SecE at the back. The
CC       channel is closed by both a pore ring composed of hydrophobic SecY
CC       resides and a short helix (helix 2A) on the extracellular side of the
CC       membrane which forms a plug. {ECO:0000255|HAMAP-Rule:MF_01465}.
CC   -!- SUBUNIT: Component of the plastid Sec protein translocase complex,
CC       which is composed of at least SecY and SecE. {ECO:0000255|HAMAP-
CC       Rule:MF_01465}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01465}; Multi-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01465}.
CC   -!- SIMILARITY: Belongs to the SecY/SEC61-alpha family. {ECO:0000255|HAMAP-
CC       Rule:MF_01465}.
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DR   EMBL; X64732; CAA45998.1; -; Genomic_DNA.
DR   PIR; S23425; S23425.
DR   AlphaFoldDB; P28540; -.
DR   SMR; P28540; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0065002; P:intracellular protein transmembrane transport; IEA:UniProtKB-UniRule.
DR   GO; GO:0006605; P:protein targeting; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.3370.10; -; 1.
DR   HAMAP; MF_01465; SecY; 1.
DR   InterPro; IPR026593; SecY.
DR   InterPro; IPR002208; SecY/SEC61-alpha.
DR   InterPro; IPR030659; SecY_CS.
DR   InterPro; IPR023201; SecY_dom_sf.
DR   PANTHER; PTHR10906; PTHR10906; 1.
DR   Pfam; PF00344; SecY; 1.
DR   PIRSF; PIRSF004557; SecY; 1.
DR   SUPFAM; SSF103491; SSF103491; 1.
DR   TIGRFAMs; TIGR00967; 3a0501s007; 1.
DR   PROSITE; PS00755; SECY_1; 1.
DR   PROSITE; PS00756; SECY_2; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Membrane; Plastid; Protein transport; Thylakoid;
KW   Translocation; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..419
FT                   /note="Protein translocase subunit SecY"
FT                   /id="PRO_0000131777"
FT   TRANSMEM        19..39
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        64..84
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        113..133
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        143..163
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        167..189
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        202..222
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        255..275
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        299..319
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        359..379
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        380..400
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
SQ   SEQUENCE   419 AA;  46618 MW;  169606854E709FF7 CRC64;
     MKKAFVLEGP LVLRLFRTIM ILIFARLGNY IPIPGITEVE SFYESSFRNT SIYNLSALSG
     GSNVISILTL GLGPFFSASL AVQFLVKLYP AFEKLQNEEG EEGRKTIVRY TRILTVLFCI
     IESFFLSNSL RSFVFNWNSI SYFVVAAAVT TGSLVLVWLS EVITERGIGN GSSLLILIGN
     LSRFRFLINK DDFDSLNVSS QSNLYIIYII ITLVSMLIFS TLSQEGARKI PVVSAKQLID
     GVEDDMRRSY IPIRFGQAGV VPIIFSSSIL LFLTTSIKQL PNANIATRVI LDSVNLQQIF
     YFFTFLVLII FFSFFYTLII LSPSDIAKNL KKMSSVIQDT KPGVATKVYI RKFILQASFV
     GSILLSALIL IPSILAAALG VHPLSISGIT SLILSFSIIN DTVRQVLAYR DTRKFLLSS