4RKU

Crystal structure of plant Photosystem I at 3 Angstrom resolution

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Photosystem I P700 chlorophyll a apoprotein A1	polymer	721	80079.5	1	UniProt (P05310)	Pisum sativum (garden pea)	PSI-A, PsaA
2	B (B)	Photosystem I P700 chlorophyll a apoprotein A2	polymer	731	82275.6	1	UniProt (P05311)	Pisum sativum (garden pea)	PSI-B, PsaB
3	C (C)	Photosystem I iron-sulfur center	polymer	80	8860.3	1	UniProt (P10793)	Pisum sativum (garden pea)	9 kDa polypeptide, PSI-C, Photosystem I subunit VII, PsaC
4	D (D)	Photosystem I reaction center subunit II, chloroplastic	polymer	137	15348.6	1	UniProt (by SIFTS) (E1C9K8)	Pisum sativum (garden pea)	Photosystem I 20 kDa subunit, PSI-D
5	E (E)	Photosystem I reaction center subunit IV B, chloroplastic	polymer	63	7184.0	1	UniProt (by SIFTS) (E1C9K6)	Pisum sativum (garden pea)	PSI-E B, Photosystem I reaction center subunit IV B isoform 2
6	F (F)	Photosystem I reaction center subunit III, chloroplastic	polymer	152	17027.8	1	UniProt (by SIFTS) (A0A0H2UKZ4)	Pisum sativum (garden pea)	Light-harvesting complex I 17 kDa protein, PSI-F
7	G (G)	Photosystem I reaction center subunit V, chloroplastic	polymer	84	9083.3	1	UniProt (by SIFTS) (P20120)	Pisum sativum (garden pea)	PSI-G
8	H (H)	Photosystem I reaction center subunit VI, chloroplastic	polymer	82	8895.1	1	UniProt (by SIFTS) (E1C9K9)	Pisum sativum (garden pea)	PSI-H, Light-harvesting complex I 11 kDa protein
9	I (I)	Photosystem I reaction center subunit VIII	polymer	26	2798.4	1	UniProt (P17227)	Pisum sativum (garden pea)	PSI-I
10	J (J)	Photosystem I reaction center subunit IX	polymer	40	4455.2	1	UniProt (D5MAL3)	Pisum sativum (garden pea)	PSI-J
11	K (K)	Photosystem I reaction center subunit X psaK	polymer	72	7260.3	1	UniProt (E1C9L3)	Pisum sativum (garden pea)
12	L (L)	Photosystem I reaction center subunit XI, chloroplastic	polymer	163	17312.7	1	UniProt (by SIFTS) (E1C9L1)	Pisum sativum (garden pea)	PSI-L, PSI subunit V
13	M (N)	Photosystem I-N subunit	polymer	85	9740.1	1	UniProt (E1C9K7)	Pisum sativum (garden pea)
14	N (1)	Chlorophyll a-b binding protein 6A, chloroplastic	polymer	182	20097.0	1	UniProt (by SIFTS) (E1C9L2)	Pisum sativum (garden pea)	LHCI type I CAB-6A, Light-harvesting complex I 26 kDa protein
15	O (2)	Type II chlorophyll a/b binding protein from photosystem I	polymer	199	21974.8	1	UniProt (Q41038) Pfam (PF00504)	Pisum sativum (garden pea)
16	P (3)	Chlorophyll a-b binding protein 3, chloroplastic	polymer	275	29634.8	1	UniProt (Q32904)	Pisum sativum (garden pea)	LHCII type III CAB-3
17	Q (4)	Chlorophyll a-b binding protein P4, chloroplastic	polymer	196	21779.7	1	UniProt (Q9SQL2)	Pisum sativum (garden pea)	LHCI type III CAB-P4
18	R, VB (A, B)	PHYLLOQUINONE	non-polymer		450.7	2	Chemie (PQN)
19	AC, BC, CC, CE, DC... (B, G, I, J, L...)	BETA-CAROTENE	non-polymer		536.9	21	Chemie (BCR)
20	IF, WB, Y, Z, ZF (1, B, A, 2)	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE	non-polymer		723.0	5	Chemie (LHG)
21	AA, AB, AD, AE, AF... (A, B, G, 1, 3...)	CHLOROPHYLL A	non-polymer		893.5	157	Chemie (CLA)
22	RB, TD, UD (A, C)	IRON/SULFUR CLUSTER	non-polymer		351.6	3	Chemie (SF4)
23	SB (A)	CHLOROPHYLL A ISOMER	non-polymer		893.5	1	Chemie (CL0)
24	XB (B)	DIGALACTOSYL DIACYL GLYCEROL (DGDG)	non-polymer		949.3	1	Chemie (DGD)
25	DE, JE (G, J)	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE	non-polymer		787.2	2	Chemie (LMG)
26	FH, GH, SE, TE, XF... (4, 1, 2)	(3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL	non-polymer		568.9	6	Chemie (LUT)
27	HH (4)	(1R,3R)-6-{(3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4R,6R)-4-HYDROXY-2,2,6-TRIMETHYL-7-OXABICYCLO[4.1.0]HEPT-1-YL]-3,7,12,16-TETRAMETHYLOCTADECA-1,3,5,7,9,11,13,15,17-NONAENYLIDENE}-1,5,5-TRIMETHYLCYCLOHEXANE-1,3-DIOL	non-polymer		600.9	1	Chemie (NEX)
28	IH (4)	SN-GLYCEROL-3-PHOSPHATE	non-polymer		172.1	1	Chemie (G3P)

Sequence modifications

A: 38 - 758 (UniProt: P05310)

PDB	External Database	Details
Arg 117	Gly 117	conflict
Ser 627	Thr 627	conflict
Gly 639	Ala 639	conflict

B: 3 - 733 (UniProt: P05311)

PDB	External Database	Details
Leu 12	Ile 12	conflict
Met 273	Val 273	conflict
Ser 471	Thr 471	conflict
Val 476	Ile 476	conflict
Leu 477	Pro 477	conflict
Ser 483	Gly 483	conflict
Ser 491	Asn 491	conflict
Gln 603	Arg 603	conflict
Tyr 635	Ile 635	conflict

K: 47 - 118 (UniProt: E1C9L3)

PDB	External Database	Details
Ser 52	Pro 6	conflict
Val 55	Leu 9	conflict
Ala 59	Thr 13	conflict
Thr 62	Ser 16	conflict
Ala 88	Val 42	conflict
Thr 111	Val 65	conflict

N: 86 - 170 (UniProt: E1C9K7)

PDB	External Database	Details
Ser 86	Gly 1	conflict
Phe 88	Ile 3	conflict
Asp 89	Glu 4	conflict
Ala 90	Glu 5	conflict
Ala 97	Thr 12	conflict
Ser 110	Thr 25	conflict
Gln 121	Glu 36	conflict
Thr 124	Ser 39	conflict
Ile 146	Leu 61	conflict
Glu 148	Asp 63	conflict
Glu 151	Asp 66	conflict
Phe 160	Tyr 75	conflict

4: 54 - 250 (UniProt: Q9SQL2)

PDB	External Database	Details
Asp 129	Ala 128	conflict
Phe 151	Ser 149	conflict

Contents of the asymmetric unit

Polymers	Number of chains	17
	Total formula weight	363807.4
Non-Polymers*	Number of molecules	200
	Total formula weight	164726.5
All*	Total formula weight	528533.9

*Water molecules are not included.