ID   SECY_PORPU              Reviewed;         411 AA.
AC   P51297;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   25-MAY-2022, entry version 78.
DE   RecName: Full=Protein translocase subunit SecY {ECO:0000255|HAMAP-Rule:MF_01465};
GN   Name=secY {ECO:0000255|HAMAP-Rule:MF_01465};
OS   Porphyra purpurea (Red seaweed) (Ulva purpurea).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Porphyra.
OX   NCBI_TaxID=2787;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Avonport;
RA   Reith M.E., Munholland J.;
RT   "Complete nucleotide sequence of the Porphyra purpurea chloroplast
RT   genome.";
RL   Plant Mol. Biol. Rep. 13:333-335(1995).
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, SecE and SecG. {ECO:0000250}.
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; U38804; AAC08183.1; -; Genomic_DNA.
DR   PIR; S73218; S73218.
DR   RefSeq; NP_053907.1; NC_000925.1.
DR   AlphaFoldDB; P51297; -.
DR   SMR; P51297; -.
DR   GeneID; 809926; -.
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..411
FT                   /note="Protein translocase subunit SecY"
FT                   /id="PRO_0000131778"
FT   TRANSMEM        13..33
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        52..72
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        111..131
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        135..155
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        163..180
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        197..217
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        252..272
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        291..311
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        350..370
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
FT   TRANSMEM        377..397
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01465"
SQ   SEQUENCE   411 AA;  45660 MW;  A353DAF0D27863FD CRC64;
     MSQKSDLRNR IKFTLLLLVL ARLGIFIPVP GIDHDAFYAS VEKNTLVNFL NIFSGGGFST
     IGIFALGIVP YINSSIVMQL LTKIIPDLEK LQKEEGELGR QKITQITRYL ALGWATLQSG
     AISIWVKPYV FNWNFTFVCE SVLALTAGSM IIMWLSELIT EKGIGNGASL LIFQNIVSGL
     PKNFTQSFFD ANYSNTSIKF GLFIVIFLLM IIITIFVQEG TRRIKIISAR QLGKSSILDP
     NSYLPLKLNQ GGVMPIVFAS ASMALPAYLT QLTQNTFLLQ VLYLFCPNGS LYLVLYSVLI
     LFFSYFYTSI VMNPEDIATN LKKMGASIPN IRPGQATIDY LQVILNRLTF LGATFLFTVA
     LIPFIIEKVA QIQNLRGLGA TSLLILVGVA IDTAKQIQTY VISKKYDSMT K