2026-08-12 REL RCSB INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY 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 RCSB RCSB 2025-12-05 2026-06-24 2026-06-24 2026-08-12 Department of Energy (DOE, United States) United States PSI-IsiA Complex from Anabaena 7120 Mazor YM Maqdisi RM Gorski CG Pakrasi HP Biswas SB Niedzwiedzki DN Iron Stress Chlorophyll Photosystem I Complex, Photosynthesis, light harvesting Mazor YM Maqdisi RM Structure of the PSI-IsiA supercomplex from Anabaena sp. PCC 7120 at 2.2 Angstroms Resolution. To Be Published 0353 Nagao R Kato K Hamaguchi T Ueno Y Tsuboshita N Shimizu S Furutani M Ehira S Nakajima Y Kawakami K Suzuki T Dohmae N Akimoto S Yonekura K Shen JR Structure of a monomeric photosystem I core associated with iron-stress-induced-A proteins from Anabaena sp. PCC 7120. Nat Commun UK 14 920 2023 36805598 doi:10.1038/s41592-020-0731-1 2041-1723 EMD-74543 consensus EM volume
Raw consensus map of the PSI-IsiA supercomplex from Anabaena sp. pcc 7120
 EMD-74544 focused EM volume
Constituent EM map: Focused refinement using PSI monomer mask
 EMD-74545 focused EM volume
Constituent EM map: Focused refinement using ISIA6,7 subunit mask
 EMD-74546 focused EM volume
Constituent EM map: Focused refinement using IsiA 1-5 subunit mask
 9zjt FULLOVERLAP EMDB EMD-74341 associated EM volume
PSI-IsiA Complex from Anabaena 7120
 EMDB EMD-74543 consensus EM volume
Raw consensus map of the PSI-IsiA supercomplex from Anabaena sp. pcc 7120
 EMDB EMD-74544 focused EM volume
Constituent EM map: Focused refinement using PSI monomer mask
 EMDB EMD-74545 focused EM volume
Constituent EM map: Focused refinement using ISIA6,7 subunit mask
 EMDB EMD-74546 focused EM volume
Constituent EM map: Focused refinement using IsiA 1-5 subunit mask
 Photosystem I monomer with 7 IsiA subunits Photosystem I monomer with 7 IsiA subunits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Nostoc sp. PCC 7120 = FACHB-418 Photosystem I reaction center subunit XI Nostoc sp. PCC 7120 = FACHB-418 0.051717449 1 LEVO MTTATINPQQYGWWAGNARFINLSGRLLGAHIAHAGLIILWAGAMTLFEITKYNPSLPIYEQGLILLPHLATLGFGIGDG GQIIDTYPYFVIGVVHLVSSAVLAAGGIYHALLGPEVLPENNQFPGFFGYDWEDEDKMTTIIGIHLLLLGAGAWLLVAKA LFWGGLYDSTVASVRVITEPTVNPARIFGYLFGAFGKQGMAAVNNLEDVVGGHIWVGILCIGGGFWHILTQPFAWAKKVL FWSGEAYLSYSLAALAYMGLLAAYFVTVNDTVYPTEFYGPLGFSSTSGVISVRTWLATSHFALAIVFLSGHIWHALRVRV LEAGLNFEQGVVNYLDTPELGNLQTPINTSDLTLKFLVNLPIYRPGLSAFARGLEIGMAHGYFLLGPFVKLGPLRNTEFA NQAGLLATIGLLLILSICLWLYGSAWFQEGKSPQGELPENLKTAKSWSEFNAGWIVGSCGGALFAYLLVTNSSLFF A0A1Z4KKX8 Photosystem II CP43 protein PsbC homolog Nostoc sp. PCC 7120 = FACHB-418 0.037540383 1 LEVO MTSIAVQTPNSIPWWSGNARLTHLSGRLLGAHVAHAGLIVLWAGATTLFELARFQTSQPMYEQGLILLPHLAVLGWGVGS GGQVIDTYPYFVIGVLHLISSAFLGLGGIFHALLGPAILEERFSFFGYRWQDANKMTTILGIHLVLLGLGAGLLVAKAVF FGGLYDPTLGEVRVISHPTWNFATIFSYLFGSHKYWIAGVDNLEDLVGGHIWVSILCIAGGLWHITTEPSAFVKSLFVWS GEAYLSYSLGALSLMSLIAAYFVSINTLAYPVEFFGPALSIGFDRFPYFQSADLLSSRVWLANAHFWLGFFFLQGHLWHA LRAAGFDFRTGKVLLPTRGQVI A0A1Z4KKX9 Photosystem II CP43 protein PsbC homolog Nostoc sp. PCC 7120 = FACHB-418 0.03516173399999999 1 LEVO MAISTDRTFAANTQLPWLIGNARLTDLSGQLLGAHIAHAGLIMFWAGTTTISEVLRFVPDVPMYEQGLILLPHLATLGWG VGVGGQVIDTYPYFVIGVLHLIASAVLGAGGLFHVFRTPAILYNNGGRTAQFHYEWNDPKQLSLILGHHLIILGLGAFLL VLKAMFFGGIYDTNLGDVRSITNPTLNPGIIFGYLVGLKDHTWHPLGIATVDNLEDVIGGHIWIGGILIFGGIWHIIVQP FAWVRRILPIENGEEILAYSLLGLALMAWISASFVGYNTTVFPTEFYGSERLFAANIQFFLGILAFLGYVWHAWRGRNIS A0A1Z4KKX7 Iron stress-induced chlorophyll-binding protein Nostoc sp. PCC 7120 = FACHB-418 0.037501277 4 LEVO MQTYDNPNIKYDWWAGNARFANLSGLFIGAHVAQAALTTLWAGAFTWFEISRYKPEIPMGEQGLILLPHLATLGFGVGVS GQVVNTYPYFVIGALHLISSAVLGAGALFHTFKGPRNLKNTTGSARKFHFEWNDPKQLGLILGHHLLFLGMAALLLVGKA MFWGGLYDATTQVVRVVNHPTLNPFVIYGYQTHFASVNNLEDLVGGHIYVGLILIGGGIWHIVKEPLPWAKKLLIFSGEA ILSYSLGGIALAGFVAAYFCAVNTLAYPVEFYGAPLELKFGVTPYFADTVKLADGGYSARAWLANAHFFLAFFFLQGHLW HALRAIGVDFRQIEKSLNAISS Q8YQ35 Photosystem I P700 chlorophyll a apoprotein A1 Nostoc sp. PCC 7120 = FACHB-418 0.08328967999999999 1 LEVO MTISPPEREEKKARVIVDKDPVPTSFEKWAQPGHFDRTLARGPKTTTWIWNLHALAHDFDTHTSDLEDISRKIFAAHFGH LAVVTIWLSGMIFHGAKFSNYEAWLSDPLNVRPSAQVVWPIVGQDILNGDVGGGFHGIQITSGLFQVWRGWGITNSFQLY CTAIGGLVLAGLFLFAGWFHYHKRAPKLEWFQNVESMLNHHLQVLLGCGSLGWAGHLIHVSAPINKLMDAGVAVKDIPLP HEFILNKSLLIDLFPGFAAGLTPFFTLNWGQYADFLTFKGGLNPVTGGLWMTDIAHHHLAIAVVFIIAGHQYRTNWGIGH SIKEILENHKGPFTGEGHKGLYENLTTSWHAQLATNLAFLGSLTIIIAHHMYAMPPYPYLATDYATQLCIFTHHIWIGGF LIVGGAAHAAIFMVRDYDPVVNQNNVLDRVIRHRDAIISHLNWVCIFLGFHSFGLYIHNDTMRALGRPQDMFSDTAIQLQ PVFAQWVQNLHTLAPGGTAPNALEPVSYAFGGGVLAVGGKVAMMPIALGTADFLIHHIHAFTIHVTVLILLKGVLFARSS RLIPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYNSLSIVIFHFSWKMQSDVWGTVDAAGNVSHITGGNFAQSA ITINGWLRDFLWAQASQVINSYGSALSAYGLMFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPAIQPRALS ITQGRAVGVAHYLLGGIATTWAFFHAHILSVG P58576 1.97.1.12 Photosystem I P700 chlorophyll a apoprotein A2 1 Nostoc sp. PCC 7120 = FACHB-418 0.083399961 1 LEVO MATKFPKFSQDLAQDPTTRRIWYAMAMGNDFESHDGMTEENLYQKIFATHFGHLAIIFLWASSLLFHVAWQGNFEQWIKD PLHVRPIAHAIWDPHFGKPAIEAFTQAGANGPVNIAYSGVYHWWYTIGMRTNTELYTGSVFLLLFASLFLFAGWLHLQPK FRPSLAWFKSAESRLNHHLAGLFGVSSLAWAGHLIHVAIPESRGQHVGWDNFLSTAPHPAGLQPFFTGNWGVYAQNPDTA GHIFSTSQGAGTAILTFLGGFHPQTESLWLTDMAHHHLAIAVLFIVAGHMYRTNFGIGHSIKEMMNAKTFFGKPVEGPFN MPHQGIYDTYNNSLHFQLGWHLACLGVVTSWVAQHMYSLPSYAFIAKDYTTQAALYTHHQYIAIFLMVGAFAHGAIFLVR DYDPEQNKGNVLERVLQHKEAIISHLSWVSLFLGFHTLGLYVHNDVVVAFGTPEKQILIEPVFAQFIQAAHGKVLYGLDT LLSNPDSVAYTAYPNYANVWLPGWLDAINSGTNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDF GYAFPCDGPGRGGTCDISAWDSFYLSLFWALNTVGWVTFYWHWKHLGIWQGNVAQFNENSTYLMGWFRDYLWANSAQLIN GYNPYGVNNLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETLVWAHERTPIANLVRWKDKPVALSIVQARVVGLAHF TVGYVLTYAAFLIASTAGKF P58565 1.97.1.12 Photosystem I iron-sulfur center Nostoc sp. PCC 7120 = FACHB-418 0.008825206 1 LEVO MSHTVKIYDTCIGCTQCVRACPTDVLEMVPWDGCKAAQVASSPRTEDCVGCKRCETACPTDFLSIRVYLGAETTRSMGLA Y P0A410 1.97.1.12 Photosystem I reaction center subunit II Nostoc sp. PCC 7120 = FACHB-418 0.015176239999999999 1 LEVO MAETLSGKTPLFAGSTGGLLTKAVEEEKYAITWTSPKAQVFELPTGGAATMHEGENLLYIARKEYGIALGGQLRKFKITN YKIYRILPSGETTFIHPADGVFPEKVNAGREKVRFNARSIGENPNPSQVKFSGKATYDA P58573 Photosystem I reaction center subunit IV Nostoc sp. PCC 7120 = FACHB-418 0.007897051 1 LEVO MVQRGSKVRILRPESYWFQDVGTVASVDQSGIKYPVIVRFDKVNYAGINTNNFAVDELIEVEAPKAKAKK P58575 Photosystem I reaction center subunit III Nostoc sp. PCC 7120 = FACHB-418 0.017850567999999997 1 LEVO MRRLFALILVICLSFSFAPPAKALGADLTPCAENPAFQALAKNARNTTADPQSGQKRFERYSQALCGPEGYPHLIVDGRL DRAGDFLIPSILFLYIAGWIGWVGRAYLQAIKKDSDTEQKEIQLDLGIALPIIATGFAWPAAAVKELLSGELTAKDSEIT VSPR P58564 Photosystem I reaction center subunit VIII Nostoc sp. PCC 7120 = FACHB-418 0.005066925 1 LEVO MATAFLPSILADASFLSSIFVPVIGWVVPIATFSFLFLYIEREDVA P58560 Photosystem I reaction center subunit IX Nostoc sp. PCC 7120 = FACHB-418 0.0054994219999999995 1 LEVO MADKADQSSYLIKFISTAPVAATIWLTITAGILIEFNRFFPDLLFHPLP P58568 Photosystem I reaction center subunit PsaK Nostoc sp. PCC 7120 = FACHB-418 0.008560202 1 LEVO MISSTLLAVAATVPATPEWSPTVGIIISASSVVALLFALKVEYPQVGPKFPGLPISVPTFIGAMAFGHVLGIGIVLGLTN IGRL A0ABR6S7R8 Photosystem I reaction center subunit XII Nostoc sp. PCC 7120 = FACHB-418 0.003538204 1 LEVO MSSISDTQVYIALVVALIPGLLAWRLATELYK Q8YNB0 Photosystem I 4.8 kDa protein Nostoc sp. PCC 7120 = FACHB-418 0.004872792 1 LEVO MAKAKISPVANTGAKPPYTFRTGWALLLLAVNFLVAAYYFHIIQ P58566 CHLOROPHYLL A 0.000893489 204 CLA (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL 0.000568871 1 LUT BETA-CAROTENE 0.000536873 43 BCR 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE 0.0007871579999999999 4 LMG DODECYL-ALPHA-D-MALTOSIDE 0.000510615 2 LMU 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE 0.00072297 7 LHG PHYLLOQUINONE 0.000450696 2 PQN DODECYL-BETA-D-MALTOSIDE 0.000510615 4 LMT CHLOROPHYLL A ISOMER 0.000893489 1 CL0 beta,beta-caroten-4-one 0.000550856 3 ECH IRON/SULFUR CLUSTER 0.00035163999999999996 3 SF4 singleParticle particle 8.0 ETHANE TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 0.5 2.5 NITROGEN FEI FALCON IV (4k x 4k) 35.0 1 PHASE FLIPPING AND AMPLITUDE CORRECTION 7Y3F 2.22 FSC 0.143 CUT-OFF cryoSPARC 96842 MAXIMUM LIKELIHOOD MAXIMUM LIKELIHOOD emd_74341.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 0 0 0 512 512 512 321.536 321.536 321.536 90.0 90.0 90.0 Z Y X -14.026446 34.680957999999997 0.020586325 1.1538727 0.628 0.628 0.628 4.34 AUTHOR Composite map combining focused maps with ISIA6&7, ISIA1to5, and PSI monomer masks. emd_74341_msk_3.map emd_74341_msk_2.map emd_74341_msk_1.map emd_74341_additional_4.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 0 0 0 512 512 512 321.536 321.536 321.536 90.0 90.0 90.0 X Y Z -0.12494774 0.37958342 0.0011415295 0.010832667 0.628 0.628 0.628 AUTHOR Focused refinement map for ISIA1to5 region. emd_74341_additional_3.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 0 0 0 512 512 512 321.536 321.536 321.536 90.0 90.0 90.0 X Y Z -0.12909578 0.25568134 0.0012302527 0.007533588 0.628 0.628 0.628 AUTHOR Focused refinement map for ISIA6,7 region. emd_74341_additional_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 0 0 0 512 512 512 321.536 321.536 321.536 90.0 90.0 90.0 X Y Z -0.13868795 0.4179621 0.0011189788 0.011577469 0.628 0.628 0.628 AUTHOR Global primary cryo-EM reconstruction of the complex, used as initial volume for subsequent local refinements. emd_74341_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 0 0 0 512 512 512 321.536 321.536 321.536 90.0 90.0 90.0 X Y Z -0.14854135 0.4230018 0.0011089204 0.01178042 0.628 0.628 0.628 AUTHOR Focused refinement map of the PSI monomer region.