Structure of PDB 7zq9 Chain B

Receptor sequence

>7zq9B (length=733) Species: 3055 (Chlamydomonas reinhardtii)

TKLFPKFSQGLAQDPTTRRIWYGLAMAHDFESHDGMTEENLYQKIFASHF
GQLSIIFLWTSGNLFHVAWQGNFEQWVTDPVHIRPIAHAIWDPHFGQPAV
EAFTRGGASGPVNISTSGVYQWWYTIGMRTNQDLYVGSVFLALVSAIFLF
AGWLHLQPNFQPSLSWFKDAESRLNHHLSGLFGVSSLAWTGHLVHVAIPE
SRGQHVGWDNFLSVLPHPQGLTPFFTGNWAAYAQSPDTASHVFGTAQGSG
QAILTFLGGFHPQTQSLWLTDMAHHHLAIAVIFIVAGHMYRTNFGIGHRM
QAILEAHTPPSGSLGAGHKGLFDTVNNSLHFQLGLALASVGTITSLVAQH
MYSLPPYAFQAIDFTTQAALYTHHQYIAGFIMCGAFAHGAIFFIRDYDPE
QNKGNVLARMLDHKEALISHLSWVSLFLGFHTLGLYVHNDVMQAFGTPEK
QILIEPVFAQWIQAAHGKALYGFDFLLSSKTSAAFANGQSLWLPGWLDAI
NNNQNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKK
DFGYSFPCDGPGRGGTCDISAYDAFYLAVFWMLNTIGWVTFYWHWKHLTL
WQGNVAQFDESSTYLMGWLRDYLWLNSSQLINGYNPFGMNSLSVWAWTFL
FGHLIYATGFMFLISWRGYWQELIETLVWAHEKTPLANLVYWKDKPVALS
IVQARLVGLAHFSVGYIFTYAAFLIASTSGRFG

3D structure

• PDB: 7zq9 Algal photosystem I dimer and high-resolution model of PSI-plastocyanin complex.
• Chain: B
• Resolution: 2.74 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	S427 L428 G431 F432 L435 I534 F582 W583	S425 L426 G429 F430 L433 I532 F580 W581
BS02	CLA	B	W649 L652 F653 H655 L656 A659	W647 L650 F651 H653 L654 A657
BS03	CLA	B	S421 S424 W425 L428	S419 S422 W423 L426
BS04	CLA	B	L679 H683 V692	L677 H681 V690
BS05	SF4	B	C560 G562 C569	C558 G560 C567
BS06	CLA	B	D442 W583 N586 L617	D440 W581 N584 L615
BS07	CLA	B	Y438 W590 F593 W620 S629 F651 H655 Y658 Y718 T721 Y722 F725	Y436 W588 F591 W618 S627 F649 H653 Y656 Y716 T719 Y720 F723
BS08	CLA	B	A659 T660 F662 M663 I666 Y671 W672	A657 T658 F660 M661 I664 Y669 W670
BS09	CLA	B	A29 H30 F32 H35 K46 I57	A27 H28 F30 H33 K44 I55
BS10	CLA	B	H30 E33 I47 S50 H51 R175 L331 L335 A338	H28 E31 I45 S48 H49 R173 L329 L333 A336
BS11	CLA	B	H30 Q54 I58 W61	H28 Q52 I56 W59
BS12	CLA	B	F67 H68 W71	F65 H66 W69
BS13	CLA	B	N65 A89 H90 N115 S117 S119 V646 W647	N63 A87 H88 N113 S115 S117 V644 W645
BS14	CLA	B	I92 W93 D94 H96 F97 N115	I90 W91 D92 H94 F95 N113
BS15	CLA	B	P95 H96	P93 H94
BS16	CLA	B	F150 A153 L156 H157 F162 W168	F148 A151 L154 H155 F160 W166
BS17	CLA	B	W168 S174 H178	W166 S172 H176
BS18	CLA	B	F48 H51 F52 L55 W124 W168 R175 H178 H179 F184	F46 H49 F50 L53 W122 W166 R173 H176 H177 F182
BS19	CLA	B	M130 D135 F142 A190 W191 H194 H197 V198 G209 W210 F213	M128 D133 F140 A188 W189 H192 H195 V196 G207 W208 F211
BS20	CLA	B	T192 V196 H197 P218 L223	T190 V194 H195 P216 L221
BS21	CLA	B	W231 H276 L279 A280	W229 H274 L277 A278
BS22	CLA	B	F258 G260 L269 H277 H352 L356 W494 W498	F256 G258 L267 H275 H350 L354 W492 W496
BS23	CLA	B	S187 W191 M274 H277 H278 I281 I345 L348 V349 Y359	S185 W189 M272 H275 H276 I279 I343 L346 V347 Y357
BS24	CLA	B	L180 F285 A288 M291 Y292	L178 F283 A286 M289 Y290
BS25	CLA	B	H178 H290 T294 F296	H176 H288 T292 F294
BS26	CLA	B	V287 M291 G299 H300	V285 M289 G297 H298
BS27	CLA	B	H300 A308 H309	H298 A306 H307
BS28	CLA	B	L306 H309 H320 V408 M412	L304 H307 H318 V406 M410
BS29	CLA	B	A172 R175 L176 M302 F324 S341 V342	A170 R173 L174 M300 F322 S339 V340
BS30	CLA	B	T344 S347 L348 Q351 Q377 L528	T342 S345 L346 Q349 Q375 L526
BS31	CLA	B	L348 H352 S355 F510	L346 H350 S353 F508
BS32	CLA	B	W61 S119 A371 T374 H375 I719 A723	W59 S117 A369 T372 H373 I717 A721
BS33	CLA	B	F59 W61 T62 G120 W124 T346 V349 M353 Y359 L372 H375 H376 I379	F57 W59 T60 G118 W122 T344 V347 M351 Y357 L370 H373 H374 I377
BS34	CLA	B	A27 D31 L335 G386 H390 I393 R397 Y556 F577	A25 D29 L333 G384 H388 I391 R395 Y554 F575
BS35	CLA	B	L316 R411 M412 H415 L419 H422	L314 R409 M410 H413 L417 H420
BS36	CLA	B	W425 F429 F432 H433	W423 F427 F430 H431
BS37	CLA	B	G436 V439 H440 M444 K452 I454	G434 V437 H438 M442 K450 I452
BS38	CLA	B	H468 W498	H466 W496
BS39	CLA	B	A486 N489 W494	A484 N487 W492
BS40	CLA	B	A461 I464 Q465 F510 H521 I524 V591 Y594	A459 I462 Q463 F508 H519 I522 V589 Y592
BS41	CLA	B	F429 P458 F460 A461 F518 H521 H522	F427 P456 F458 A459 F516 H519 H520
BS42	CLA	B	L423 V426 H529	L421 V424 H527
BS43	CLA	B	W23 H683 Y693 W694 K695 P698	W21 H681 Y691 W692 K693 P696
BS44	CLA	B	L656 I657 F664 H713	L654 I655 F662 H711
BS45	CLA	B	H309 T310 P311 P312 S315 L316	H307 T308 P309 P310 S313 L314
BS46	PQN	B	M663 F664 S667 W668 R669 W672 A700 L701 A706	M661 F662 S665 W666 R667 W670 A698 L699 A704
BS47	CLA	B	F460 W463	F458 W461
BS48	CLA	B	P687 L688	P685 L686

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:0009507 chloroplast
• GO:0009522 photosystem I
• GO:0009535 chloroplast thylakoid membrane
• GO:0009579 thylakoid
• GO:0016020 membrane

External links

• PDB: RCSB:7zq9, PDBe:7zq9, PDBj:7zq9
• PDBsum: 7zq9
• PubMed: 36229605
• UniProt: P09144|PSAB_CHLRE Photosystem I P700 chlorophyll a apoprotein A2 (Gene Name=psaB)