ID   APCE_NEOYE              Reviewed;         886 AA.
AC   Q1XDM4;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   02-MAY-2006, sequence version 1.
DT   03-AUG-2022, entry version 61.
DE   RecName: Full=Phycobiliprotein ApcE;
DE            EC=4.-.-.-;
DE   AltName: Full=Anchor polypeptide;
DE   AltName: Full=PBS-anchor protein;
DE   AltName: Full=Phycobilisome linker polypeptide;
GN   Name=apcE;
OS   Neopyropia yezoensis (Susabi-nori) (Pyropia yezoensis).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Neopyropia.
OX   NCBI_TaxID=2788;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=U-51;
RA   Kunimoto M., Morishima K., Yoshikawa M., Fukuda S., Kobayashi T.,
RA   Kobayashi M., Okazaki T., Ohara I., Nakayama I.;
RT   "Whole genome sequence of Porphyra yezoensis chloroplast.";
RL   Submitted (NOV-2003) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: This protein is postulated to act both as terminal energy
CC       acceptor and as a linker polypeptide that stabilizes the phycobilisome
CC       architecture. May have intrinsic bilin lyase activity (By similarity).
CC       {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Peripheral membrane protein {ECO:0000250}; Stromal side
CC       {ECO:0000250}.
CC   -!- PTM: Contains one covalently linked bilin chromophore. This protein
CC       autochromophorylates (Potential). {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00775}.
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DR   EMBL; AP006715; BAE92387.1; -; Genomic_DNA.
DR   RefSeq; YP_536944.1; NC_007932.1.
DR   AlphaFoldDB; Q1XDM4; -.
DR   SMR; Q1XDM4; -.
DR   GeneID; 3978830; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
DR   GO; GO:0016829; F:lyase activity; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.3130.20; -; 3.
DR   Gene3D; 1.10.490.20; -; 1.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR001297; PBS_linker_dom.
DR   InterPro; IPR038255; PBS_linker_sf.
DR   InterPro; IPR012128; Phycobilisome_asu/bsu.
DR   InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR   Pfam; PF00427; PBS_linker_poly; 3.
DR   Pfam; PF00502; Phycobilisome; 2.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS51445; PBS_LINKER; 3.
PE   3: Inferred from homology;
KW   Antenna complex; Bile pigment; Chloroplast; Chromophore;
KW   Electron transport; Lyase; Membrane; Photosynthesis; Phycobilisome;
KW   Plastid; Repeat; Thylakoid; Transport.
FT   CHAIN           1..886
FT                   /note="Phycobiliprotein ApcE"
FT                   /id="PRO_0000277340"
FT   DOMAIN          244..424
FT                   /note="PBS-linker 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
FT   DOMAIN          496..678
FT                   /note="PBS-linker 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
FT   DOMAIN          695..876
FT                   /note="PBS-linker 3"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
FT   BINDING         187
FT                   /ligand="(2R,3E)-phycocyanobilin"
FT                   /ligand_id="ChEBI:CHEBI:85275"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   886 AA;  100273 MW;  D1BE598AD5D48791 CRC64;
     MSIKASGGSP LARPQLYRTA SILTITQAEQ QDRFLQLGEL NQLVSFLNSG QKRLEVADIL
     TKNANILVAR AADKIFVGGS AISYLERPQA AVIIAGDQSS QDKINELSGN IQGDFGQSFR
     SLFNAGGATP PGFKPINVLR YGTTRMRKSL RDLDWFLRYL TYAIVSGDPN ILSVNIRGLR
     ELIDNACSSA AAIVALREMR RTALLIFEED IKGQDLVKEY FNVVISEFEA PSLTDKLRKR
     ISGDLQGLRL PQTYVQAGVS TPRFVMKPSL SADEKNIVVK ACYRQIFERD IAKAYDLSLS
     NLESQVKNGQ ISIKEFIRSL GTSSIYRKQF YEPFVNSRAL ELAFRHFLGR GPSSLEEFQK
     YFAILSSTGL SGLVNALLNS SEYTDYFGEE TVPYFRNLGE EPQECRNWGP QIDLLTYSAP
     FRKVPQFITL FSDYKQSLPD QHPYGIGNDP LSIQFGAIFP KENKDPRKRQ ALFGKDTRRI
     LVRRGPGIYN QISNPQVRPK SAGSLGPKIF KLSNALIKSD SSQNFENSVE VVTKVAYLRV
     FGREVYQEEK LILKPIESQL KDNQITVREF VRQLAKSSIF RSLYWEPLYI CKAIEYIHNR
     LLGRPTYGRQ EINKYFDIAY KQGYYQVIDT IIDSSEYTET FGDNTVPYER YSTPAGVALR
     SLRPGIIDQR FKKVIASKSA RFVELGTVKE MRSSNDIQSR ISQGVTSLRD QSIVFEVNSD
     SNKEMLEQAL RAAYRQIFER DLNSFSVGGE FLDIKSAFLN RQICVKELVE KLALSELYGK
     EFYQPYPNTK VIELGTKHIL GRAPNNQAEI RFFNQILASK GLSAFISNLV ESVEYNAVYG
     KDTVPYRRFP TLPAANFPNT ETLYNRLTKQ DISIVVPSFK KVLGNQ