2026-09-16 REL PDBe INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY REMEDIATION REPOSITORY Metalloprotein remediation STRUCTURE_SUMMARY chem_comp em_admin pdbx_modification_feature pdbx_nonpoly_atom_coordination pdbx_nonpoly_atom_coordination_sphere pdbx_nonpoly_atom_coordination_sphere_order _chem_comp.formula _em_admin.last_update EXPERIMENTAL_SUMMARY em_admin _em_admin.last_update PDBe PDBe 2025-07-18 2026-07-29 2026-07-29 2026-09-16 European Research Council (ERC) 101053983-GrInSun European Union Cryo-EM structure of Posidonia oceanica PSI-LHCI supercomplex - Composite map Capaldi S Amelii A Sanita G Esposito M Bassi R Photosystem I, PSI-LHCI, Posidonia oceanica, Photosynthesis Amelii A Capaldi S Russo M Guardini Z Sanita G Esposito E Olive I Maiuri M Dall'Osto L Cerullo G Procaccini G Bassi R Structural and spectral adaptation of the seagrass Posidonia oceanica photosystem I to seabed light. Nat Commun UK 17 2026 42463682 doi:10.1038/s41467-026-75200-8 2041-1723 EMD-54379 consensus EM volume
consensus map
 EMD-54380 focused EM volume
Focused map - PSI core
 EMD-54396 focused EM volume
Focused map - LHCI belt
 9s1l FULLOVERLAP EMDB EMD-54379 consensus EM volume
consensus map
 EMDB EMD-54380 focused EM volume
Focused map - PSI core
 EMDB EMD-54396 focused EM volume
Focused map - LHCI belt
 EMDB EMD-54455 associated EM volume
Cryo-EM structure of Posidonia oceanica PSI-LHCI supercomplex
 Photosystem I (PSI-LHCI) Photosystem I (PSI-LHCI) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Posidonia oceanica Chlorophyll a-b binding protein 6, chloroplastic (Lhca1) Posidonia oceanica 0.021878111 1 LEVO SAEWMPGQPRPPYLDGSAPGDFGFDPLRLGEVPSNLERFKEAELIHCRWAMLAVPGILVPEALGLGNWVKAQEWAAVPGG QATYLGNPVPWGTLPIILAVEFITIAFAEQLRSMEKDPEKKKYPGGAFDPLGFSKDPAKLQEFKVKEIKNGRLALLAFVG FCVQQSAYPGTGPLENLATHLADPWHNNIGDVVIPRSIFP Photosystem I chlorophyll a/b-binding protein 2 (Lhca2) Posidonia oceanica 0.023094199 1 LEVO AAASERPLWFPGSNPPEWLDGSLPGDFGFDPLGLSSDPESLKWNVQAEIVHCRWAMLGAAGIFVPELLTKLGILNTPSWY TAGELEYFTDTTTLFIIELVLIGWAEGRRWADMINPGCVNTDPVFPNNKLTGTDVGYPGGLWFDPLGWGSGSPEKIKELR TKEIKNGRLAMLAVMGAWFQHIYTGTGPIDNLFAHLADPGHATIFAAFSPK Photosystem I chlorophyll a/b-binding protein 3-1 (Lhca3) Posidonia oceanica 0.025149671999999998 1 LEVO TSTPPAKQGAGRQLWFASKQSLSYLDGSLPGDFGFDPLGLSDPEGTGGFINPRWLAYAEIMNGRFAMLGAAGSIAPELFG KLGLIPQETALPWFQSGVIPPAGTYSYWADPYTLFVFELALMGFAEHRRYQDWSKPGSMGKQYFLGLEKGLGGSGDPAYP GGPFFNPLGFGKDEKSMKELKLKEIKNGRLAMLAILGYFIQGLVTGASPLQNLLDHLADPVNNNVLTSLKFH Chlorophyll a-b binding protein 4 (Lhca4) Posidonia oceanica 0.02215815 1 LEVO KKGEWLPGLASPNYLNGSLPGDNGFDPLGLGEDPESLKWFVQAELQNGRWAMLAVAGVLLPEVLTKIGIINVPEWYDAGK SEYFASSSTLFVIEFILFHYVEIRRWQDIKNPGCVNQDPIFKNYSLPPGEVGYPGGIFNPLNFAPSLEAKEKEIANGRLA MLAFLGFLVQHNVTGKGPIDNLLQHISDPWHNTIIQTFSG Photosystem I P700 chlorophyll a apoprotein A1 (PsaA) Posidonia oceanica 0.08321723399999999 1 LEVO MIIRSPEPEVKIVVDRDPVKTSFEEWARPGHFSRTIAKGPDTTTWIWNLHADAHDFDSHTSDLEEISRKVFSAHFGQLSI IFLWLSGMYFHGARFSNYEAWLSDPTHIGPSAQVVWPIVGQEILNGDVGGGFRGIQITSGFFQLWRASGITSELQLYCTA IGALVFASLMLFAGWFHYHKAAPKLAWFQDVESMLNHHLAGLLGLGSLSWAGHQIHISLPINQFLDAGVDPKEIPLPHEF ILNRDLLAQLYPSFAEGATPFFTLNWSKYADFLTFRGGLDPITGGLWLSDIAHHHLAIAILFLIAGHMYRTNWGIGHGLK DILEAHKGPFTGQGHKGLYEILTTSWHAQLSLNLAMLGSLTIVVAHHMYSMPPYPYLAIDYGTQLSLFTHHMWIGGFLIV GAAAHAAIFMVRDYDPTTRYNDLLDRVLRHRDAIISHLNWACIFLGFHSFGLYIHNDTMSALGRPQDMFSDTAIQLQPIF AQWVQNTHALAPGTTAPGATASTSLTWGGGELVAVGGKVALLPIPLGTADFLVHHIHAFTIHVTVLILLKGVLFARSSRL IPDKANLGFRFPCDGPGRGGTCQVSAWDHVFLGLFWMYNAISVVIFHFSWKMQSDVWGTISDQGVVTHITGGNFAQSSIT INGWLRDFLWAQASQVIQSYGSSLSAYGLFFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPATQPRALSIV QGRAVGVTHYLLGGIATTWAFFLARIIAVG Photosystem I P700 chlorophyll a apoprotein A2 (PsaB) Posidonia oceanica 0.082521711 1 LEVO MALRFPRFSQGLAQDPTTRRIWFGIATAHDFESHDDITEERLYQNIFASHFGQLAIIFLWTSGNLFHVAWQGNFESWVQD PLHVRPIAHAIWDPHFGQPAVEAFTRGGALGPVNIAYSGVYQWWYTIGLRTNEDLYTGALFLLFLSAISLIAGWLHLQPK WKPSVSWFKNAESRLNHHLSGLFGVSSLAWTGHLVHVAIPASRGEYVRWNNFLDVLPYPQGLGPLFTGQWNLYAQNPDSG SHLFGTSQGAGTAILTLLGGFHPQTQSLWLTDIAHHHLAIAFIFLVAGHMYRTNFGIGHSIKDLLEAHIPPGGRLGRGHK GLYDTINNSIHFQLGLALASLGVVTSLVAQHMYSLPAYAFIAQDFTTQAALYTHHQYIAGFIMTGAFAHGAIFFIRDYNP EQNEDNVLARMLDHKEAIISHLSWASLFLGFHTLGLYVHNDVMLAFGTPEKQILIEPIFAQWIQSAHGKTSYGFDVLLSS TNGPAFNAGRNIWLPGWLNAVNENSNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDFGYSFPCD GPGRGGTCDISAWDAFYLAVFWMLNTIGWVTFYWHWKHITLWQGNVSQFNESSTYLMGWLRDYLWLNSSQLINGYNPFGM NSLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETLAWAHERTPLANLIRWRDKPVALSIVQARLVGLAHFSVGYIFT YAAFLIASTSGKFG Photosystem I iron-sulfur center (PsaC) Posidonia oceanica 0.009040498999999999 1 LEVO MSHSVKIYDTCIGCTQCVRACPTDVLEMIPWDGCKAKQIASAPRTEDCVGCKRCESACPTDFLSVRVYLYHETTRSMALA Y Photosystem I reaction center subunit II-1 (PsaD) Posidonia oceanica 0.017169596000000002 1 LEVO SATQEATTEAPVGFTPPELDPNTPSPIFGGSTGGLLRKAQVEEFYVITWTSPKEQVFEMPTGGAAIMREGPNLLKLARKE QCLALGTRLRSKYKIDYQFYRVFPNGEVQYLHPKDGIYPEKVNAGRLGVGLNMRSIGKNVSPIEVKFTGKQPYDL Photosystem I reaction center subunit IV A (PsaE1) Posidonia oceanica 0.010392691 1 LEVO ASGEETAPVAEEKRPAADPPAAAKPKPEKIGPKRGTKVKILRRESYWFNGVGSVVTVDQDPNSRYPVVVRFNKVNYNNVF TNNYAFDEILEVK Photosystem I reaction center subunit III (PsaF) Posidonia oceanica 0.017759669999999998 1 LEVO DIAGLTPCKESKAFAKREKQSLKKLESSLKKYAPDSAPALAIKASMEKTKRRFDNYGKQGLLCGSDGLPHLIVSGDQRHW GEFITPGILFLYIAGWIGWVGRSYLIAIRDEKKPTMKEIIIDVPLASKLIWRGFIWPVAAYRELINGDLVVDDADVSVT Photosystem I reaction center subunit V (PsaG) Posidonia oceanica 0.011023403 1 LEVO ELNPQVVICLSTGLSLFLGRFVFFNFQRENVAKQGLPKQNGISHFEAGDERAKEYVGLLKSNDPVGFNIVDVLAWGSIGH IVAYYVLATSSNGYDPNFFG Photosystem I reaction center subunit VI-1 (PsaH1) Posidonia oceanica 0.010508876 1 LEVO KYGDKSVYFDLEDLPNTTGQWDLYGSDAPSPYNSLQSKFFETFAAPFTKRGLLLKFLILGGGFTLAYYSSTASGDILPIK KGPQLPPELGPRDKK Photosystem I reaction center subunit VIII (PsaI) Posidonia oceanica 0.00394082 1 LEVO MTDLNLPSIFVPLVGLVFPAIAMASLFLHVQKNKIV Photosystem I reaction center subunit IX (PsaJ) Posidonia oceanica 0.004777645999999999 1 LEVO MRDIKTYLSVAPVLTTLWFGSLAGLLIEINRLFPDALSFPFF Photosystem I reaction center subunit psaK (PsaK) Posidonia oceanica 0.008471875 1 LEVO DFIGSSTNIIMVTTTSLMLFAGRFGLAPSANRKATAGLKLEVRDSGLQTGDPAGFTLADTLACGVVGHIMGVGIVLGLKS IGAI Photosystem I reaction center subunit XI (PsaL) Posidonia oceanica 0.018128881 1 LEVO AIQAEKPTTFQVIEPINGDPFIGSLETPVTSSPLVAWYLSNLPAYRTAVSPLLRGIEVGLAHGYLLVGPFVITGPLRNTP YHGAAGSLAAGGLVVILSICLTMYGISSFKEGEPSCAPGLTLTGRKKEADKLQTADGWAQFTGGFFFGGISGVIWAYFLL YVLDLPYYIK CHLOROPHYLL B 0.000907472 12 CHL CHLOROPHYLL A 0.000893489 143 CLA (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL 0.000568871 5 LUT (3S,5R,6S,3'S,5'R,6'S)-5,6,5',6'-DIEPOXY-5,6,5',6'- TETRAHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL 0.00060087 4 XAT BETA-CAROTENE 0.000536873 28 BCR 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE 0.00072297 6 LHG 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE 0.0007871579999999999 7 LMG DODECYL-BETA-D-MALTOSIDE 0.000510615 4 LMT PHYLLOQUINONE 0.000450696 2 PQN IRON/SULFUR CLUSTER 0.00035163999999999996 3 SF4 DIGALACTOSYL DIACYL GLYCEROL (DGDG) 0.0009492989999999999 1 DGD singleParticle particle 7.5 10.0 C8H18N2O4S Hepes 0.01 C24H46O11 n-DODECYL-beta-D-MALTOSIDE Quantifoil R1.2/1.3 GOLD 300 GLOW DISCHARGE ETHANE 100 298 FEI VITROBOT MARK IV TFS GLACIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 0.75 2.5 130000.0 NITROGEN TFS Selectris X 10 FEI FALCON IV (4k x 4k) 50.0 1 PHASE FLIPPING AND AMPLITUDE CORRECTION 2.83 FSC 0.143 CUT-OFF cryoSPARC 4.6.2 120603 MAXIMUM LIKELIHOOD MAXIMUM LIKELIHOOD emd_54455.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 400 400 400 0 0 0 400 400 400 368.0 368.0 368.0 90.0 90.0 90.0 Z Y X -19.686316999999999 40.985934999999998 0.0019309204 0.9859702 0.92 0.92 0.92 4.3 AUTHOR composite map 5ZJI PDB experimental model RIGID BODY FIT UCSF ChimeraX 1.9 REAL