11YO: Photosystem II protein D1 1

Single-conformation model re-refinement of 2F/S3-rich PSII intermediate structure at 2.09 Angstrom resolution. Determined by X-ray diffraction at 2.09 Å resolution. Released 1 Apr 2026.

Method
X-ray diffraction
Resolution
2.09 Å
Organism
Thermosynechococcus vestitus BP-1
Chains
40
Atoms
52,261
Mol. weight
759.2 kDa
Ligands
FE2, CLA, BCR, PL9
Released
1 Apr 2026

Explore 11YO in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

11YO contains 303 α-helices and 172 β-strands across 40 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain a: 23 helices, 11 β-strands

ElementResiduesLengthSheet
α-helix13-219
α-helix31-5424
α-helix55-573
β-strand58143
α-helix661
β-strand67143
α-helix681
α-helix71-733
β-strand81-82244
α-helix83-864
α-helix96-983
α-helix102-1076
α-helix110-13627
α-helix143-15513
α-helix156-1605
α-helix161-1655
α-helix168-1703
α-helix172-1732
β-strand174-175244
α-helix176-19015
α-helix192-1943
α-helix196-22025
β-strand223145
β-strand224146
α-helix233-2364
β-strand243147
β-strand246145
α-helix248-25811
α-helix261-2633
α-helix268-29326
β-strand297-298248
β-strand307149
β-strand313149
α-helix317-33115
Chain A: 21 helices, 11 β-strands
ElementResiduesLengthSheet
α-helix13-219
α-helix31-5424
β-strand5811
β-strand6711
α-helix71-733
β-strand81-8222
α-helix83-864
α-helix96-983
α-helix102-1076
α-helix110-13627
α-helix143-15513
α-helix156-1605
α-helix161-1655
α-helix168-1703
α-helix172-1732
β-strand174-17522
α-helix176-19015
α-helix192-1943
α-helix196-22126
β-strand22313
β-strand22414
α-helix2251
α-helix233-2364
β-strand24315
β-strand24613
α-helix248-25811
α-helix261-2633
α-helix268-29326
β-strand297-29826
β-strand30717
β-strand31317
α-helix317-33115
Chain b: 28 helices, 25 β-strands
ElementResiduesLengthSheet
β-strand3-4250
α-helix5-128
α-helix16-4429
α-helix55-584
α-helix63-686
β-strand73151
β-strand79151
α-helix93-11624
β-strand120152
α-helix121-1233
β-strand124153
β-strand131153
α-helix135-15218
α-helix153-1586
β-strand166-168354
β-strand177-179354
α-helix187-1904
α-helix195-21824
α-helix220-2212
β-strand222155
α-helix223-2286
α-helix234-25825
α-helix265-2684
α-helix272-2765
α-helix279-29315
α-helix298-3036
α-helix307-3126
β-strand314156
α-helix315-3173
β-strand323157
α-helix330-3323
β-strand336-342758
β-strand343-347559
β-strand353-354259
β-strand355-356260
α-helix357-3604
β-strand369-371360
β-strand377-380460
α-helix392-3954
β-strand398-402559
β-strand410-411259
α-helix414-42310
α-helix424-4263
β-strand427156
β-strand429-433558
α-helix447-47428
α-helix476-4783
β-strand482146
α-helix488-4914
β-strand496161
β-strand498162
α-helix502-5043
β-strand505161
Chain B: 28 helices, 25 β-strands
ElementResiduesLengthSheet
β-strand3-428
α-helix5-128
α-helix16-4429
α-helix55-573
α-helix63-686
β-strand7319
β-strand7919
α-helix93-11624
β-strand120110
α-helix121-1233
β-strand124111
β-strand131111
α-helix135-15218
α-helix153-1586
β-strand166-168312
β-strand177-179312
α-helix187-1904
α-helix195-21824
α-helix220-2212
β-strand222113
α-helix223-2286
α-helix234-25825
α-helix265-2684
α-helix272-2765
α-helix279-29315
α-helix298-3036
α-helix307-3126
β-strand314114
α-helix315-3173
α-helix319-3213
β-strand323115
α-helix331-3344
β-strand336-342716
β-strand343-347517
β-strand353-354217
β-strand355-356218
α-helix357-3604
β-strand369-371318
β-strand377-380418
α-helix392-3954
β-strand398-402517
β-strand410-411217
α-helix414-42411
β-strand427114
β-strand429-433516
α-helix447-47428
α-helix476-4783
β-strand48214
α-helix488-4914
β-strand496119
β-strand498120
α-helix502-5043
β-strand505119
Chain c: 25 helices, 15 β-strands
ElementResiduesLengthSheet
α-helix28-314
α-helix35-428
α-helix46-7429
α-helix81-833
α-helix89-946
β-strand99163
α-helix101-1033
β-strand105163
α-helix109-13022
α-helix131-1355
α-helix140-1434
α-helix154-18027
β-strand185-187364
β-strand195-197364
α-helix206-2149
α-helix223-2264
α-helix230-25324
α-helix258-2636
α-helix268-29225
α-helix299-3024
α-helix306-32318
β-strand332165
β-strand338165
β-strand341-343366
β-strand349-351366
α-helix354-3585
α-helix367-3693
β-strand370-371266
β-strand374-375266
α-helix377-3826
α-helix386-39611
β-strand402-403248
β-strand407167
β-strand408148
α-helix413-4142
β-strand418167
α-helix422-45332
β-strand459168
α-helix465-4684
α-helix470-4712
Chain C: 25 helices, 13 β-strands
ElementResiduesLengthSheet
α-helix35-428
α-helix46-7429
α-helix81-833
α-helix89-935
β-strand99121
α-helix101-1033
β-strand105121
α-helix109-13022
α-helix131-1355
α-helix154-18027
β-strand185-187322
β-strand195-197322
α-helix206-2094
α-helix211-2144
α-helix223-2264
α-helix230-25324
α-helix258-2614
α-helix268-29225
α-helix299-3024
α-helix306-32318
β-strand332123
β-strand338123
β-strand341-343324
β-strand349-351324
α-helix353-3586
α-helix367-3693
β-strand370-371224
β-strand374-375224
α-helix377-3826
α-helix386-39611
β-strand402-40326
β-strand40816
α-helix413-4142
α-helix422-45332
β-strand459125
α-helix461-4633
α-helix466-4683
α-helix470-4712
Chain d: 23 helices, 10 β-strands
ElementResiduesLengthSheet
α-helix14-229
β-strand24162
α-helix31-5424
β-strand57169
α-helix58-614
β-strand63169
β-strand77-78270
α-helix79-824
α-helix83-853
α-helix101-1077
α-helix109-13628
α-helix141-1455
α-helix147-1537
α-helix154-1596
α-helix160-1634
α-helix167-1693
α-helix171-1722
β-strand173-174270
α-helix175-18915
α-helix191-1933
α-helix195-21925
β-strand222171
β-strand223168
α-helix231-2344
β-strand241147
β-strand244171
α-helix246-25712
α-helix264-29027
β-strand294157
α-helix299-3079
α-helix314-33320
α-helix335-3373
α-helix343-3453
Chain D: 22 helices, 10 β-strands
ElementResiduesLengthSheet
α-helix14-229
β-strand24120
α-helix31-5424
β-strand57126
β-strand63126
α-helix67-693
β-strand77-78227
α-helix79-824
α-helix83-853
α-helix101-1077
α-helix109-13628
α-helix141-15414
α-helix155-1595
α-helix160-1634
α-helix167-1693
α-helix171-1722
β-strand173-174227
α-helix175-18915
α-helix191-1933
α-helix195-21925
β-strand222128
β-strand223125
α-helix232-2343
β-strand24115
β-strand244128
α-helix246-25712
α-helix264-29027
β-strand294115
α-helix299-3079
α-helix314-33320
α-helix335-3373
α-helix343-3453

29 more chain groups are not listed. Open the entry in the viewer and use the sequence panel to see them.

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Photosystem II protein D1 1A, aprotein344Thermosynechococcus vestitus BP-1P0A444 (AlphaFold model)
Photosystem II CP47 reaction center proteinB, bprotein510Thermosynechococcus vestitus BP-1Q8DIQ1 (AlphaFold model)
Photosystem II CP43 reaction center proteinC, cprotein461Thermosynechococcus vestitus BP-1Q8DIF8 (AlphaFold model)
Photosystem II D2 proteinD, dprotein352Thermosynechococcus vestitus BP-1Q8CM25 (AlphaFold model)
Cytochrome b559 subunit alphaE, eprotein84Thermosynechococcus vestitus BP-1Q8DIP0
Cytochrome b559 subunit betaF, fprotein45Thermosynechococcus vestitus BP-1Q8DIN9
Photosystem II reaction center protein HH, hprotein66Thermosynechococcus vestitus BP-1Q8DJ43
Photosystem II reaction center protein II, iprotein38Thermosynechococcus vestitus BP-1Q8DJZ6
Photosystem II reaction center protein JJ, jprotein40Thermosynechococcus vestitus BP-1P59087
Photosystem II reaction center protein KK, kprotein46Thermosynechococcus vestitus BP-1Q9F1K9
Photosystem II reaction center protein LL, lprotein37Thermosynechococcus vestitus BP-1Q8DIN8
Photosystem II reaction center protein MM, mprotein36Thermosynechococcus vestitus BP-1Q8DHA7

8 more molecules are not listed.

Sequence of entity 1 (A, a), FASTA
>11YO_1 Photosystem II protein D1 1 (chains A, a)
MTTTLQRRESANLWERFCNWVTSTDNRLYVGWFGVIMIPTLLAATICFVIAFIAAPPVDI
DGIREPVSGSLLYGNNIITGAVVPSSNAIGLHFYPIWEAASLDEWLYNGGPYQLIIFHFL
LGASCYMGRQWELSYRLGMRPWICVAYSAPLASAFAVFLIYPIGQGSFSDGMPLGISGTF
NFMIVFQAEHNILMHPFHQLGVAGVFGGALFCAMHGSLVTSSLIRETTETESANYGYKFG
QEEETYNIVAAHGYFGRLIFQYASFNNSRSLHFFLAAWPVVGVWFTALGISTMAFNLNGF
NFNHSVIDAKGNVINTWADIINRANLGMEVMHERNAHNFPLDLA
Sequence of entity 2 (B, b), FASTA
>11YO_2 Photosystem II CP47 reaction center protein (chains B, b)
MGLPWYRVHTVLINDPGRLIAAHLMHTALVAGWAGSMALYELATFDPSDPVLNPMWRQGM
FVLPFMARLGVTGSWSGWSITGETGIDPGFWSFEGVALAHIVLSGLLFLAACWHWVYWDL
ELFRDPRTGEPALDLPKMFGIHLFLAGLLCFGFGAFHLTGLFGPGMWVSDPYGLTGSVQP
VAPEWGPDGFNPYNPGGVVAHHIAAGIVGIIAGLFHILVRPPQRLYKALRMGNIETVLSS
SIAAVFFAAFVVAGTMWYGSATTPIELFGPTRYQWDSSYFQQEINRRVQASLASGATLEE
AWSAIPEKLAFYDYIGNNPAKGGLFRTGPMNKGDGIAQAWKGHAVFRNKEGEELFVRRMP
AFFESFPVILTDKNGVVKADIPFRRAESKYSFEQQGVTVSFYGGELNGQTFTDPPTVKSY
ARKAIFGEIFEFDTETLNSDGIFRTSPRGWFTFAHAVFALLFFFGHIWHGARTLFRDVFS
GIDPELSPEQVEWGFYQKVGDVTTRRKEAV
Sequence of entity 3 (C, c), FASTA
>11YO_3 Photosystem II CP43 reaction center protein (chains C, c)
MVTLSSNSIFATNRDQESSGFAWWAGNARLINLSGKLLGAHVAHAGLIVFWAGAMTLFEL
AHFIPEKPMYEQGLILIPHIATLGWGVGPGGEVVDTFPFFVVGVVHLISSAVLGFGGVYH
AIRGPETLEEYSSFFGYDWKDKNKMTTILGFHLIVLGIGALLLVAKAMFFGGLYDTWAPG
GGDVRVITNPTLDPRVIFGYLLKSPFGGEGWIVSVNNLEDVVGGHIWIGLICIAGGIWHI
LTTPFGWARRAFIWSGEAYLSYSLGALSMMGFIATCFVWFNNTVYPSEFYGPTGPEASQA
QAMTFLIRDQKLGANVGSAQGPTGLGKYLMRSPTGEIIFGGETMRFWDFRGPWLEPLRGP
NGLDLNKIKNDIQPWQERRAAEYMTHAPLGSLNSVGGVATEINSVNFVSPRSWLATSHFV
LAFFFLVGHLWHAGRARAAAAGFEKGIDRESEPVLSMPSLD
Sequence of entity 4 (D, d), FASTA
>11YO_4 Photosystem II D2 protein (chains D, d)
MTIAIGRAPAERGWFDILDDWLKRDRFVFVGWSGILLFPCAYLALGGWLTGTTFVTSWYT
HGLASSYLEGCNFLTVAVSTPANSMGHSLLLLWGPEAQGDFTRWCQLGGLWTFIALHGAF
GLIGFMLRQFEIARLVGVRPYNAIAFSAPIAVFVSVFLIYPLGQSSWFFAPSFGVAAIFR
FLLFFQGFHNWTLNPFHMMGVAGVLGGALLCAIHGATVENTLFQDGEGASTFRAFNPTQA
EETYSMVTANRFWSQIFGIAFSNKRWLHFFMLFVPVTGLWMSAIGVVGLALNLRSYDFIS
QEIRAAEDPEFETFYTKNLLLNEGIRAWMAPQDQPHENFVFPEEVLPRGNAL
Sequence of entity 5 (E, e), FASTA
>11YO_5 Cytochrome b559 subunit alpha (chains E, e)
MAGTTGERPFSDIITSVRYWVIHSITIPALFIAGWLFVSTGLAYDVFGTPRPDSYYAQEQ
RSIPLVTDRFEAKQQVETFLEQLK
Sequence of entity 6 (F, f), FASTA
>11YO_6 Cytochrome b559 subunit beta (chains F, f)
MTSNTPNQEPVSYPIFTVRWVAVHTLAVPTIFFLGAIAAMQFIQR
Sequence of entity 7 (H, h), FASTA
>11YO_7 Photosystem II reaction center protein H (chains H, h)
MARRTWLGDILRPLNSEYGKVAPGWGTTPLMAVFMGLFLVFLLIILEIYNSTLILDGVNV
SWKALG
Sequence of entity 8 (I, i), FASTA
>11YO_8 Photosystem II reaction center protein I (chains I, i)
METLKITVYIVVTFFVLLFVFGFLSGDPARNPKRKDLE
Sequence of entity 9 (J, j), FASTA
>11YO_9 Photosystem II reaction center protein J (chains J, j)
MMSEGGRIPLWIVATVAGMGVIVIVGLFFYGAYAGLGSSL
Sequence of entity 10 (K, k), FASTA
>11YO_10 Photosystem II reaction center protein K (chains K, k)
MIDALVLVAKLPEAYAIFDPLVDVLPVIPVLFLALAFVWQAAVGFR
Sequence of entity 11 (L, l), FASTA
>11YO_11 Photosystem II reaction center protein L (chains L, l)
MEPNPNRQPVELNRTSLYLGLLLILVLALLFSSYFFN
Sequence of entity 12 (M, m), FASTA
>11YO_12 Photosystem II reaction center protein M (chains M, m)
MEVNQLGLIATALFVLVPSVFLIILYVQTESQQKSS

Ligands and cofactors

IDNameFormulaCopies
FE2FE (II) ionFe2
CLAChlorophyll aC55 H72 Mg N4 O570
BCRBeta-caroteneC40 H5622
PL92,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-he…C53 H80 O24
SQD1,2-di-O-acyl-3-O-[6-deoxy-6-sulfo-alpha-D-glucopyranosyl]-sn-glycerolC41 H78 O12 S8
DGDDigalactosyl diacyl glycerol (DGDG)C51 H96 O159
STEStearic acidC18 H36 O238
OEXCa-MN4-O5 clusterCa Mn4 O52
LMG1,2-distearoyl-monogalactosyl-diglycerideC45 H86 O1013
LHG1,2-dipalmitoyl-phosphatidyl-glyceroleC38 H75 O10 P10
BCTBicarbonate ionC H O32
PHOPheophytin aC55 H74 N4 O54
HECHeme CC34 H36 Fe N4 O44

Water and common crystallization additives (CL) are not listed.

Primary citation

Do crystallographic XFEL data support binding of a water molecule to the oxygen-evolving complex of photosystem II exposed to two flashes of light? Wang, J., Armstrong, W.H., Batista, V.S. Proc Natl Acad Sci U S A (2021) 118:e2023982118. DOI 10.1073/pnas.202398211 · PubMed

Other PDB entries of the same protein (UniProt P0A444 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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