Structure of PDB 7qco Chain b

Receptor sequence

>7qcob (length=734) Species: 1378066 (Chroococcidiopsis sp. TS-821)

TKFPKFSQDLAQDPTTRRLWYGIATAHDFETHDGMTEENLYQKLFATHFG
HVAIIFLWTSSLLFHVAWQGNFEQWIKDPLNVRPIAHAIWDPHFGKAAVD
AFTQAGATYPVNIAYSGVYHWWYTIGMRTNNDLYSGAVFLLILAGVFLFA
GWLHLQPKFRPSLSWFKSAEPRLNHHLAGLFGVSSLAWTGHLVHVAIPES
RGQHVGWDNFLTTLPHPEGLRPFFTGNWGVYAANPDTANHVFGTSQGAGT
AILTFLGGFHPQTQSLWLTDMAHHHLAIAVLFIIAGHMYRTNFGIGHSIK
EMLNAKNFFGTKTEGQFNLPHQGLYDTINNSLHFQLSLALAALGTITSLV
AQHMYALPPYAFMGQDFTTQAALYTHHQYIAVFLMVGAFAHAGIFWVRDY
DAEQNKGNVLDRVLQHKEAIISHLSWVSLFLGFHTLGLYVHNDVVVAFGT
PEKQILIEPVFAQFIQASHGKVLYGLNTLLSNPDSVASTAGAAWLPGWLD
AINNGTNSLFLTIGPGDFLVHHAFALGIHTTVLVLVKGALDARGSKLMPD
KKDFGYAFPCDGPGRGGTCDISAWDAFYLALFWALNTVGWVTFYWHWKHL
GIWQGNVAQFNESSTYLMGWLRDYLWLYSAQLINGYNPYGMNNLSVWAWM
FLFGHLVWATGFMFLISWRGYWQELIETLVWAHERTPLASLVRWKDKPVA
MSIVQGRLVGLAHFTVGYVLTYAAFVIASTAGKF

3D structure

• PDB: 7qco Cryo-EM structure of a tetrameric photosystem I from Chroococcidiopsis TS-821, a thermophilic, unicellular, non-heterocyst-forming cyanobacterium.
• Chain: b
• Resolution: 3.7 Å

Enzymatic activity

• Enzyme Commision number: 1.97.1.12: photosystem I.

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	CLA	b	P94 H95	P92 H93
BS02	CLA	b	H657 L658	H655 L656
BS03	CLA	b	L681 H685	L679 H683
BS04	CLA	b	W585 N588 L619	W583 N586 L617
BS05	CLA	b	L627 H657 W660 Y720 T723	L625 H655 W658 Y718 T721
BS06	CLA	b	L658 A661 T662 M665 W674	L656 A659 T660 M663 W672
BS07	CLA	b	F8 A28 H29	F6 A26 H27
BS08	CLA	b	L46 H50 H53 L338	L44 H48 H51 L336
BS09	CLA	b	H29 H53 W60	H27 H51 W58
BS10	CLA	b	S63 F66 H67 W70	S61 F64 H65 W68
BS11	CLA	b	A88 H89 N114 I115 A116 Y117 S118 W649	A86 H87 N112 I113 A114 Y115 S116 W647
BS12	CLA	b	I91 W92 D93 H95 V648	I89 W90 D91 H93 V646
BS13	CLA	b	A152 H156 W167	A150 H154 W165
BS14	CLA	b	W167 H177	W165 H175
BS15	CLA	b	F51 W167 R174 H177 H178 G181 L182	F49 W165 R172 H175 H176 G179 L180
BS16	CLA	b	F141 A189 H193 H196 G208 W209 F212	F139 A187 H191 H194 G206 W207 F210
BS17	CLA	b	H196 T215 P217 L222	H194 T213 P215 L220
BS18	CLA	b	W230 G231 L255 H275 W496	W228 G229 L253 H273 W494
BS19	CLA	b	F257 L268 D272 H275 H276 A279	F255 L266 D270 H273 H274 A277
BS20	CLA	b	F183 W190 M273 H276 I280 Y362	F181 W188 M271 H274 I278 Y360
BS21	CLA	b	F284 M290 Y291 I301	F282 M288 Y289 I299
BS22	CLA	b	H289 T293 F295	H287 T291 F293
BS23	CLA	b	I286 M290 G298 H299	I284 M288 G296 H297
BS24	CLA	b	M304 A307 F310 Q318 F319	M302 A305 F308 Q316 F317
BS25	CLA	b	L305 Q318 F319 H323 V411	L303 Q316 F317 H321 V409
BS26	CLA	b	R174 L175	R172 L173
BS27	CLA	b	S350 Q354 I530 V534	S348 Q352 I528 V532
BS28	CLA	b	L351 H355 F512	L349 H353 F510
BS29	CLA	b	W60 S118 H378	W58 S116 H376
BS30	CLA	b	T61 W123 T349 H379	T59 W121 T347 H377
BS31	CLA	b	H29 D30 G389 H393	H27 D28 G387 H391
BS32	CLA	b	R414 H418	R412 H416
BS33	CLA	b	W428 F432 F435 H436 H443	W426 F430 F433 H434 H441
BS34	CLA	b	V442 H443 V446 K455	V440 H441 V444 K453
BS35	CLA	b	I467 H471 W500	I465 H469 W498
BS36	CLA	b	A492 G493	A490 G491
BS37	CLA	b	F463 F512 Y596 W597	F461 F510 Y594 W595
BS38	CLA	b	P461 F463 F520 H524	P459 F461 F518 H522
BS39	CLA	b	H685 R695 W696 K697 P700	H683 R693 W694 K695 P698
BS40	CLA	b	W22 F655 L658 F666 V711 H715	W20 F653 L656 F664 V709 H713
BS41	PQN	b	S669 R671 W674 M703	S667 R669 W672 M701
BS42	CLA	b	L690 A691	L688 A689

Gene Ontology

Molecular Function

• GO:0000287 magnesium ion binding
• GO:0009055 electron transfer activity
• GO:0016168 chlorophyll binding
• GO:0016491 oxidoreductase activity
• GO:0046872 metal ion binding
• GO:0051539 4 iron, 4 sulfur cluster binding

Biological Process

• GO:0015979 photosynthesis

Cellular Component

• GO:0009522 photosystem I
• GO:0009579 thylakoid
• GO:0016020 membrane
• GO:0031676 plasma membrane-derived thylakoid membrane
• GO:0042651 thylakoid membrane

External links

• PDB: RCSB:7qco, PDBe:7qco, PDBj:7qco
• PDBsum: 7qco
• PubMed: 35059628
• UniProt: A0A2S6VGS2