6HQB

Monomeric cyanobacterial photosystem I

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	751	83036.4	1	UniProt (P29254) Pfam (PF00223)	Synechocystis sp. (strain PCC 6803 / Kazusa)	PsaA
2	B (B)	Photosystem I P700 chlorophyll a apoprotein A2	polymer	731	81369.5	1	UniProt (P29255) Pfam (PF00223)	Synechocystis sp. (strain PCC 6803 / Kazusa)	PsaB
3	C (C)	Photosystem I iron-sulfur center	polymer	80	8706.1	1	UniProt (P32422) Pfam (PF12838)	Synechocystis sp. (strain PCC 6803 / Kazusa)	9 kDa polypeptide,PSI-C,Photosystem I subunit VII,PsaC
4	D (D)	Photosystem I reaction center subunit II	polymer	141	15663.7	1	UniProt (P19569) Pfam (PF02531)	Synechocystis sp. (strain PCC 6803 / Kazusa)	Photosystem I 16 kDa polypeptide,PSI-D
5	E (E)	Photosystem I reaction center subunit IV	polymer	69	7680.5	1	UniProt (P12975) Pfam (PF02427)	Synechocystis sp. (strain PCC 6803 / Kazusa)	Photosystem I 8.1 kDa protein,p30 protein
6	F (F)	Photosystem I reaction center subunit III	polymer	143	15791.1	1	UniProt (P29256) Pfam (PF02507)	Synechocystis sp. (strain PCC 6803 / Kazusa)	PSI-F
7	G (I)	Photosystem I reaction center subunit VIII	polymer	40	4414.1	1	UniProt (Q55330) Pfam (PF00796)	Synechocystis sp. (strain PCC 6803 / Kazusa)
8	H (J)	Photosystem I reaction center subunit IX	polymer	40	4535.4	1	UniProt (Q55329) Pfam (PF01701)	Synechocystis sp. (strain PCC 6803 / Kazusa)
9	I (K)	Photosystem I reaction center subunit PsaK 2	polymer	70	7339.8	1	UniProt (P74564) Pfam (PF01241)	Synechocystis sp. (strain PCC 6803 / Kazusa)	Photosystem I subunit X 2
10	J (L)	Photosystem I reaction center subunit XI	polymer	137	14523.5	1	UniProt (P37277) Pfam (PF02605)	Synechocystis sp. (strain PCC 6803 / Kazusa)	PSI subunit V,PSI-L
11	K (M)	Photosystem I reaction center subunit XII	polymer	31	3382.1	1	UniProt (P72986) Pfam (PF07465)	Synechocystis sp. (strain PCC 6803 / Kazusa)	PSI-M
12	AA, AC, AD, BA, BC... (A, B, J, K, L...)	CHLOROPHYLL A	non-polymer		893.5	93	Chemie (CLA)
13	AB, DD (A, B)	PHYLLOQUINONE	non-polymer		450.7	2	Chemie (PQN)
14	BB, RD, SD (A, C)	IRON/SULFUR CLUSTER	non-polymer		351.6	3	Chemie (SF4)
15	CB, DB, EB, ED, EE... (A, B, J, K, F...)	BETA-CAROTENE	non-polymer		536.9	14	Chemie (BCR)
16	GB, HB, LD, ND (A, B)	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE	non-polymer		723.0	4	Chemie (LHG)
17	NB (B)	beta,beta-carotene-4,4'-dione	non-polymer		564.8	1	Chemie (45D)
18	OB (B)	CHLORIDE ION	non-polymer		35.5	1	Chemie (CL)
19	GD, KE (B, M)	beta,beta-caroten-4-one	non-polymer		550.9	2	Chemie (ECH)
20	KD, MD (B)	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE	non-polymer		787.2	2	Chemie (LMG)
21	OD, TD (B, F)	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL	non-polymer		795.1	2	Chemie (SQD)
22	IE, PD (L, B)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
23	BE, XD (J, F)	(1~{S})-3,5,5-trimethyl-4-[(1~{E},3~{E},5~{E},7~{E},9~{E},11~{E},13~{E},15~{E},17~{E})-3,7,12,16-tetramethyl-18-[(4~{S})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol	non-polymer		568.9	2	Chemie (C7Z)
24	YD (F)	DODECYL-BETA-D-MALTOSIDE	non-polymer		510.6	1	Chemie (LMT)
25	AE (I)	(3'R)-3'-hydroxy-beta,beta-caroten-4-one	non-polymer		566.9	1	Chemie (EQ3)

Sequence modifications

L: 22 - 157 (UniProt: P37277)

PDB	External Database	Details
His 158	-	insertion

Contents of the asymmetric unit

Polymers	Number of chains	11
	Total formula weight	246442.2
Non-Polymers*	Number of molecules	130
	Total formula weight	102620.8
All*	Total formula weight	349063.1

*Water molecules are not included.