1JB0

Crystal Structure of Photosystem I: a Photosynthetic Reaction Center and Core Antenna System from Cyanobacteria

PDB DOI: https://doi.org/10.2210/pdb1JB0/pdb

Classification: PHOTOSYNTHESIS
Organism(s): Synechococcus elongatus
Mutation(s): No
Membrane Protein: Yes OPMPDBTMMemProtMDmpstruc

Deposited: 2001-06-01 Released: 2001-08-01
Deposition Author(s): Jordan, P., Fromme, P., Witt, H.T., Klukas, O., Saenger, W., Krauss, N.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.50 Å
R-Value Free: 0.217
R-Value Work: 0.199
R-Value Observed: 0.199

wwPDB Validation 3D Report Full Report

This is version 1.6 of the entry. See complete history.

Literature

Three-dimensional Structure of Cyanobacterial Photosystem I at 2.5 A Resolution

Jordan, P., Fromme, P., Witt, H.T., Klukas, O., Saenger, W., Krauss, N.

(2001) Nature 411: 909-917

PubMed: 11418848 Search on PubMed
DOI: https://doi.org/10.1038/35082000
Primary Citation of Related Structures:
1JB0

PubMed Abstract:
Life on Earth depends on photosynthesis, the conversion of light energy from the Sun to chemical energy. In plants, green algae and cyanobacteria, this process is driven by the cooperation of two large protein-cofactor complexes, photosystems I and II, which are located in the thylakoid photosynthetic membranes. The crystal structure of photosystem I from the thermophilic cyanobacterium Synechococcus elongatus described here provides a picture at atomic detail of 12 protein subunits and 127 cofactors comprising 96 chlorophylls, 2 phylloquinones, 3 Fe4S4 clusters, 22 carotenoids, 4 lipids, a putative Ca2+ ion and 201 water molecules. The structural information on the proteins and cofactors and their interactions provides a basis for understanding how the high efficiency of photosystem I in light capturing and electron transfer is achieved.

Organizational Affiliation

Institut für Chemie/Kristallographie, Freie Universität Berlin, D-14195 Berlin, Takustrasse 6, Germany.

Macromolecule Content

Total Structure Weight: 359.7 kDa
Atom Count: 24,198
Modelled Residue Count: 2,243
Deposited Residue Count: 2,334
Unique protein chains: 12

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM I P700 CHLOROPHYLL A APOPROTEIN A1	A	755	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A405 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A405 Go to UniProtKB: P0A405
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0A405
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Reference Sequence

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Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM I P700 CHLOROPHYLL A APOPROTEIN A2	B	740	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A407 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A407 Go to UniProtKB: P0A407
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Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0A407
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Reference Sequence

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Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM I IRON-SULFUR CENTER	C	80	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A415 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A415 Go to UniProtKB: P0A415
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0A415
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Reference Sequence

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Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT II	D	138	Synechococcus elongatus	Mutation(s): 0
UniProt
Find proteins for P0A420 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A420 Go to UniProtKB: P0A420
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UniProt Group	P0A420
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Reference Sequence

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Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT IV	E	75	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A423 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A423 Go to UniProtKB: P0A423
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UniProt Group	P0A423
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Reference Sequence

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Entity ID: 6
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT III	F	164	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A401 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A401 Go to UniProtKB: P0A401
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UniProt Group	P0A401
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Reference Sequence

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Entity ID: 7
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT VIII	G [auth I]	38	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A427 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A427 Go to UniProtKB: P0A427
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UniProt Group	P0A427
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Reference Sequence

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Entity ID: 8
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT IX	H [auth J]	41	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A429 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A429 Go to UniProtKB: P0A429
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UniProt Group	P0A429
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Reference Sequence

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Entity ID: 9
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT X	I [auth K]	83	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A425 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A425 Go to UniProtKB: P0A425
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UniProt Group	P0A425
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Reference Sequence

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Entity ID: 10
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT XI	J [auth L]	154	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for Q8DGB4 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore Q8DGB4 Go to UniProtKB: Q8DGB4
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UniProt Group	Q8DGB4
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Reference Sequence

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Entity ID: 11
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT XII	K [auth M]	31	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P0A403 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore P0A403 Go to UniProtKB: P0A403
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UniProt Group	P0A403
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Reference Sequence

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Entity ID: 12
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOTOSYSTEM I SUBUNIT PSAX	L [auth X]	35	Synechococcus elongatus	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for Q8DKP6 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore Q8DKP6 Go to UniProtKB: Q8DKP6
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UniProt Group	Q8DKP6
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Reference Sequence

Small Molecules

Ligands 7 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CLA Query on CLA Download Ideal Coordinates CCD File SDF format, chain AB [auth A] SDF format, chain AC [auth B] SDF format, chain AD [auth B] SDF format, chain BA [auth A] SDF format, chain BB [auth A] SDF format, chain BC [auth B] SDF format, chain BD [auth B] SDF format, chain CA [auth A] SDF format, chain CB [auth A] SDF format, chain CC [auth B] SDF format, chain CE [auth L] SDF format, chain DB [auth A] SDF format, chain DC [auth B] SDF format, chain DD [auth B] SDF format, chain EA [auth A] SDF format, chain EB [auth A] SDF format, chain EC [auth B] SDF format, chain ED [auth B] SDF format, chain FA [auth A] SDF format, chain FC [auth B] SDF format, chain HE [auth M] SDF format, chain IC [auth B] SDF format, chain JA [auth A] SDF format, chain JC [auth B] SDF format, chain JE [auth X] SDF format, chain KA [auth A] SDF format, chain KC [auth B] SDF format, chain LA [auth A] SDF format, chain LC [auth B] SDF format, chain M [auth A] SDF format, chain MA [auth A] SDF format, chain MC [auth B] SDF format, chain O [auth A] SDF format, chain OA [auth A] SDF format, chain OC [auth B] SDF format, chain P [auth A] SDF format, chain PA [auth A] SDF format, chain Q [auth A] SDF format, chain QA [auth A] SDF format, chain QB [auth B] SDF format, chain R [auth A] SDF format, chain RA [auth A] SDF format, chain RB [auth B] SDF format, chain RC [auth B] SDF format, chain RD [auth F] SDF format, chain SA [auth A] SDF format, chain SB [auth B] SDF format, chain SC [auth B] SDF format, chain TC [auth B] SDF format, chain UB [auth B] SDF format, chain UC [auth B] SDF format, chain V [auth A] SDF format, chain VB [auth B] SDF format, chain VC [auth B] SDF format, chain VD [auth J] SDF format, chain W [auth A] SDF format, chain WC [auth B] SDF format, chain WD [auth J] SDF format, chain X [auth A] SDF format, chain XC [auth B] SDF format, chain YA [auth A] SDF format, chain YC [auth B] SDF format, chain Z [auth A] SDF format, chain ZC [auth B] SDF format, chain AA [auth A] SDF format, chain AE [auth K] SDF format, chain CD [auth B] SDF format, chain DA [auth A] SDF format, chain DE [auth L] SDF format, chain EE [auth L] SDF format, chain FB [auth A] SDF format, chain GA [auth A] SDF format, chain GC [auth B] SDF format, chain HA [auth A] SDF format, chain HC [auth B] SDF format, chain IA [auth A] SDF format, chain N [auth A] SDF format, chain NA [auth A] SDF format, chain NC [auth B] SDF format, chain PC [auth B] SDF format, chain QC [auth B] SDF format, chain S [auth A] SDF format, chain T [auth A] SDF format, chain TA [auth A] SDF format, chain TB [auth B] SDF format, chain U [auth A] SDF format, chain UA [auth A] SDF format, chain VA [auth A] SDF format, chain WA [auth A] SDF format, chain WB [auth B] SDF format, chain XA [auth A] SDF format, chain XB [auth B] SDF format, chain Y [auth A] SDF format, chain YB [auth B] SDF format, chain ZA [auth A] SDF format, chain ZB [auth B] MOL2 format, chain AB [auth A] MOL2 format, chain AC [auth B] MOL2 format, chain AD [auth B] MOL2 format, chain BA [auth A] MOL2 format, chain BB [auth A] MOL2 format, chain BC [auth B] MOL2 format, chain BD [auth B] MOL2 format, chain CA [auth A] MOL2 format, chain CB [auth A] MOL2 format, chain CC [auth B] MOL2 format, chain CE [auth L] MOL2 format, chain DB [auth A] MOL2 format, chain DC [auth B] MOL2 format, chain DD [auth B] MOL2 format, chain EA [auth A] MOL2 format, chain EB [auth A] MOL2 format, chain EC [auth B] MOL2 format, chain ED [auth B] MOL2 format, chain FA [auth A] MOL2 format, chain FC [auth B] MOL2 format, chain HE [auth M] MOL2 format, chain IC [auth B] MOL2 format, chain JA [auth A] MOL2 format, chain JC [auth B] MOL2 format, chain JE [auth X] MOL2 format, chain KA [auth A] MOL2 format, chain KC [auth B] MOL2 format, chain LA [auth A] MOL2 format, chain LC [auth B] MOL2 format, chain M [auth A] MOL2 format, chain MA [auth A] MOL2 format, chain MC [auth B] MOL2 format, chain O [auth A] MOL2 format, chain OA [auth A] MOL2 format, chain OC [auth B] MOL2 format, chain P [auth A] MOL2 format, chain PA [auth A] MOL2 format, chain Q [auth A] MOL2 format, chain QA [auth A] MOL2 format, chain QB [auth B] MOL2 format, chain R [auth A] MOL2 format, chain RA [auth A] MOL2 format, chain RB [auth B] MOL2 format, chain RC [auth B] MOL2 format, chain RD [auth F] MOL2 format, chain SA [auth A] MOL2 format, chain SB [auth B] MOL2 format, chain SC [auth B] MOL2 format, chain TC [auth B] MOL2 format, chain UB [auth B] MOL2 format, chain UC [auth B] MOL2 format, chain V [auth A] MOL2 format, chain VB [auth B] MOL2 format, chain VC [auth B] MOL2 format, chain VD [auth J] MOL2 format, chain W [auth A] MOL2 format, chain WC [auth B] MOL2 format, chain WD [auth J] MOL2 format, chain X [auth A] MOL2 format, chain XC [auth B] MOL2 format, chain YA [auth A] MOL2 format, chain YC [auth B] MOL2 format, chain Z [auth A] MOL2 format, chain ZC [auth B] MOL2 format, chain AA [auth A] MOL2 format, chain AE [auth K] MOL2 format, chain CD [auth B] MOL2 format, chain DA [auth A] MOL2 format, chain DE [auth L] MOL2 format, chain EE [auth L] MOL2 format, chain FB [auth A] MOL2 format, chain GA [auth A] MOL2 format, chain GC [auth B] MOL2 format, chain HA [auth A] MOL2 format, chain HC [auth B] MOL2 format, chain IA [auth A] MOL2 format, chain N [auth A] MOL2 format, chain NA [auth A] MOL2 format, chain NC [auth B] MOL2 format, chain PC [auth B] MOL2 format, chain QC [auth B] MOL2 format, chain S [auth A] MOL2 format, chain T [auth A] MOL2 format, chain TA [auth A] MOL2 format, chain TB [auth B] MOL2 format, chain U [auth A] MOL2 format, chain UA [auth A] MOL2 format, chain VA [auth A] MOL2 format, chain WA [auth A] MOL2 format, chain WB [auth B] MOL2 format, chain XA [auth A] MOL2 format, chain XB [auth B] MOL2 format, chain Y [auth A] MOL2 format, chain YB [auth B] MOL2 format, chain ZA [auth A] MOL2 format, chain ZB [auth B]	AA [auth A] AB [auth A] AC [auth B] AD [auth B] AE [auth K] AA [auth A], AB [auth A], AC [auth B], AD [auth B], AE [auth K], BA [auth A], BB [auth A], BC [auth B], BD [auth B], CA [auth A], CB [auth A], CC [auth B], CD [auth B], CE [auth L], DA [auth A], DB [auth A], DC [auth B], DD [auth B], DE [auth L], EA [auth A], EB [auth A], EC [auth B], ED [auth B], EE [auth L], FA [auth A], FB [auth A], FC [auth B], GA [auth A], GC [auth B], HA [auth A], HC [auth B], HE [auth M], IA [auth A], IC [auth B], JA [auth A], JC [auth B], JE [auth X], KA [auth A], KC [auth B], LA [auth A], LC [auth B], M [auth A], MA [auth A], MC [auth B], N [auth A], NA [auth A], NC [auth B], O [auth A], OA [auth A], OC [auth B], P [auth A], PA [auth A], PC [auth B], Q [auth A], QA [auth A], QB [auth B], QC [auth B], R [auth A], RA [auth A], RB [auth B], RC [auth B], RD [auth F], S [auth A], SA [auth A], SB [auth B], SC [auth B], T [auth A], TA [auth A], TB [auth B], TC [auth B], U [auth A], UA [auth A], UB [auth B], UC [auth B], V [auth A], VA [auth A], VB [auth B], VC [auth B], VD [auth J], W [auth A], WA [auth A], WB [auth B], WC [auth B], WD [auth J], X [auth A], XA [auth A], XB [auth B], XC [auth B], Y [auth A], YA [auth A], YB [auth B], YC [auth B], Z [auth A], ZA [auth A], ZB [auth B], ZC [auth B]	CHLOROPHYLL A C₅₅ H₇₂ Mg N₄ O₅ ATNHDLDRLWWWCB-AENOIHSZSA-M		Interactions Focus chain AA [auth A] Focus chain AB [auth A] Focus chain AC [auth B] Focus chain AD [auth B] Focus chain AE [auth K] Focus chain BA [auth A] Focus chain BB [auth A] Focus chain BC [auth B] Focus chain BD [auth B] Focus chain CA [auth A] Focus chain CB [auth A] Focus chain CC [auth B] Focus chain CD [auth B] Focus chain CE [auth L] Focus chain DA [auth A] Focus chain DB [auth A] Focus chain DC [auth B] Focus chain DD [auth B] Focus chain DE [auth L] Focus chain EA [auth A] Focus chain EB [auth A] Focus chain EC [auth B] Focus chain ED [auth B] Focus chain EE [auth L] Focus chain FA [auth A] Focus chain FB [auth A] Focus chain FC [auth B] Focus chain GA [auth A] Focus chain GC [auth B] Focus chain HA [auth A] Focus chain HC [auth B] Focus chain HE [auth M] Focus chain IA [auth A] Focus chain IC [auth B] Focus chain JA [auth A] Focus chain JC [auth B] Focus chain JE [auth X] Focus chain KA [auth A] Focus chain KC [auth B] Focus chain LA [auth A] Focus chain LC [auth B] Focus chain M [auth A] Focus chain MA [auth A] Focus chain MC [auth B] Focus chain N [auth A] Focus chain NA [auth A] Focus chain NC [auth B] Focus chain O [auth A] Focus chain OA [auth A] Focus chain OC [auth B] Focus chain P [auth A] Focus chain PA [auth A] Focus chain PC [auth B] Focus chain Q [auth A] Focus chain QA [auth A] Focus chain QB [auth B] Focus chain QC [auth B] Focus chain R [auth A] Focus chain RA [auth A] Focus chain RB [auth B] Focus chain RC [auth B] Focus chain RD [auth F] Focus chain S [auth A] Focus chain SA [auth A] Focus chain SB [auth B] Focus chain SC [auth B] Focus chain T [auth A] Focus chain TA [auth A] Focus chain TB [auth B] Focus chain TC [auth B] Focus chain U [auth A] Focus chain UA [auth A] Focus chain UB [auth B] Focus chain UC [auth B] Focus chain V [auth A] Focus chain VA [auth A] Focus chain VB [auth B] Focus chain VC [auth B] Focus chain VD [auth J] Focus chain W [auth A] Focus chain WA [auth A] Focus chain WB [auth B] Focus chain WC [auth B] Focus chain WD [auth J] Focus chain X [auth A] Focus chain XA [auth A] Focus chain XB [auth B] Focus chain XC [auth B] Focus chain Y [auth A] Focus chain YA [auth A] Focus chain YB [auth B] Focus chain YC [auth B] Focus chain Z [auth A] Focus chain ZA [auth A] Focus chain ZB [auth B] Focus chain ZC [auth B]
LMG Query on LMG Download Ideal Coordinates CCD File SDF format, chain ND [auth B] MOL2 format, chain ND [auth B]	ND [auth B]	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE C₄₅ H₈₆ O₁₀ DCLTVZLYPPIIID-CVELTQQQSA-N		Interactions Focus chain ND [auth B]
LHG Query on LHG Download Ideal Coordinates CCD File SDF format, chain OB [auth A] SDF format, chain OD [auth B] SDF format, chain PB [auth A] MOL2 format, chain OB [auth A] MOL2 format, chain OD [auth B] MOL2 format, chain PB [auth A]	OB [auth A], OD [auth B], PB [auth A]	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE C₃₈ H₇₅ O₁₀ P BIABMEZBCHDPBV-MPQUPPDSSA-N		Interactions Focus chain OB [auth A] Focus chain OD [auth B] Focus chain PB [auth A]
BCR Query on BCR Download Ideal Coordinates CCD File SDF format, chain GE [auth L] SDF format, chain HD [auth B] SDF format, chain ID [auth B] SDF format, chain JB [auth A] SDF format, chain JD [auth B] SDF format, chain KB [auth A] SDF format, chain LB [auth A] SDF format, chain LD [auth B] SDF format, chain NB [auth A] SDF format, chain SD [auth F] SDF format, chain TD [auth I] SDF format, chain UD [auth I] SDF format, chain ZD [auth J] SDF format, chain FE [auth L] SDF format, chain GD [auth B] SDF format, chain IB [auth A] SDF format, chain IE [auth M] SDF format, chain KD [auth B] SDF format, chain MB [auth A] SDF format, chain MD [auth B] SDF format, chain XD [auth J] SDF format, chain YD [auth J] MOL2 format, chain GE [auth L] MOL2 format, chain HD [auth B] MOL2 format, chain ID [auth B] MOL2 format, chain JB [auth A] MOL2 format, chain JD [auth B] MOL2 format, chain KB [auth A] MOL2 format, chain LB [auth A] MOL2 format, chain LD [auth B] MOL2 format, chain NB [auth A] MOL2 format, chain SD [auth F] MOL2 format, chain TD [auth I] MOL2 format, chain UD [auth I] MOL2 format, chain ZD [auth J] MOL2 format, chain FE [auth L] MOL2 format, chain GD [auth B] MOL2 format, chain IB [auth A] MOL2 format, chain IE [auth M] MOL2 format, chain KD [auth B] MOL2 format, chain MB [auth A] MOL2 format, chain MD [auth B] MOL2 format, chain XD [auth J] MOL2 format, chain YD [auth J]	FE [auth L] GD [auth B] GE [auth L] HD [auth B] IB [auth A] FE [auth L], GD [auth B], GE [auth L], HD [auth B], IB [auth A], ID [auth B], IE [auth M], JB [auth A], JD [auth B], KB [auth A], KD [auth B], LB [auth A], LD [auth B], MB [auth A], MD [auth B], NB [auth A], SD [auth F], TD [auth I], UD [auth I], XD [auth J], YD [auth J], ZD [auth J]	BETA-CAROTENE C₄₀ H₅₆ OENHQHLEOONYIE-JLTXGRSLSA-N		Interactions Focus chain FE [auth L] Focus chain GD [auth B] Focus chain GE [auth L] Focus chain HD [auth B] Focus chain IB [auth A] Focus chain ID [auth B] Focus chain IE [auth M] Focus chain JB [auth A] Focus chain JD [auth B] Focus chain KB [auth A] Focus chain KD [auth B] Focus chain LB [auth A] Focus chain LD [auth B] Focus chain MB [auth A] Focus chain MD [auth B] Focus chain NB [auth A] Focus chain SD [auth F] Focus chain TD [auth I] Focus chain UD [auth I] Focus chain XD [auth J] Focus chain YD [auth J] Focus chain ZD [auth J]
PQN Query on PQN Download Ideal Coordinates CCD File SDF format, chain FD [auth B] SDF format, chain GB [auth A] MOL2 format, chain FD [auth B] MOL2 format, chain GB [auth A]	FD [auth B], GB [auth A]	PHYLLOQUINONE C₃₁ H₄₆ O₂ MBWXNTAXLNYFJB-NKFFZRIASA-N		Interactions Focus chain FD [auth B] Focus chain GB [auth A]
SF4 Query on SF4 Download Ideal Coordinates CCD File SDF format, chain HB [auth A] SDF format, chain PD [auth C] SDF format, chain QD [auth C] MOL2 format, chain HB [auth A] MOL2 format, chain PD [auth C] MOL2 format, chain QD [auth C]	HB [auth A], PD [auth C], QD [auth C]	IRON/SULFUR CLUSTER Fe₄ S₄ LJBDFODJNLIPKO-UHFFFAOYSA-N		Interactions Focus chain HB [auth A] Focus chain PD [auth C] Focus chain QD [auth C]
CA Query on CA Download Ideal Coordinates CCD File SDF format, chain BE [auth L] MOL2 format, chain BE [auth L]	BE [auth L]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain BE [auth L]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.50 Å
R-Value Free: 0.217
R-Value Work: 0.199
R-Value Observed: 0.199
Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 281	α = 90
b = 281	β = 90
c = 165.2	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing
CNS	refinement

Structure Validation

View Full Validation Report

Entry History

Deposition Data

Released Date: 2001-08-01

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2001-08-01
Type: Initial release
Version 1.1: 2008-04-27
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Derived calculations, Version format compliance
Version 1.3: 2012-07-25
Changes: Non-polymer description
Version 1.4: 2016-05-11
Changes: Derived calculations
Version 1.5: 2018-01-24
Changes: Database references
Version 1.6: 2019-11-20
Changes: Advisory, Database references, Derived calculations

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.

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Crystal Structure of Photosystem I: a Photosynthetic Reaction Center and Core Antenna System from Cyanobacteria

Three-dimensional Structure of Cyanobacterial Photosystem I at 2.5 A Resolution

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