Structure of PDB 7ew6 Chain B

Receptor sequence

>7ew6B (length=733) Species: 77009 (Hordeum vulgare subsp. spontaneum)

ELRFPRFSQGLAQDPTTRRIWFGIATAHDFESHDDITEERLYQNIFASHF
GQLAIIFLWTSGNLFHVAWQGNFESWIQDPLHVRPIAHAIWDPHFGQPAV
EAFTRGGAAGPVNIAYSGVYQWWYTIGLRTNEDLYTGALFLLFLSTLSLI
ASWLHLQPKWKPSLSWFKNAESRLNHHLSGLFGVSSLAWTGHLVHVAIPA
SRGEYVRWNNFLDVLPYPQGLGPLLTGQWNLYAQNPDSSNHLFGTAQGAG
TAILTLLGGFHPQTQSLWLTDMAHHHLAIAFIFLIAGHMYRTNFGIGHSI
KDLLEAHTPPGGRLGRGHKGLYDTINNSIHFQLGLALASLGVITSLVAQH
MYSLPPYAFIAQDFTTQAALYTHHQYIAGFIMTGAFAHGAIFFIRDYNPE
QNEDNVLARMLDHKEAIISHLSWASLFLGFHTLGLYVHNDVMLAFGTPEK
QILIEPIFAQWIQSAHGKTTYGFDILLSSTNGPAFNAGRSLWLPGWLNAV
NENSNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKK
DFGYSFPCDGPGRGGTCDISAWDAFYLAVFWMLNTIGWVTFYWHWKHITL
WQGNVSQFNESSTYLMGWLRDYLWLNSSQLINGYNPFGMNSLSVWAWMFL
FGHLVWATGFMFLISWRGYWQELIETLAWAHERTPLANLIRWRDKPVALS
IVQARLVGLAHFSVGYIFTYAAFLIASTSGKFG

3D structure

• PDB: 7ew6 Architecture of the chloroplast PSI-NDH supercomplex in Hordeum vulgare.
• Chain: B
• Resolution: 3.4 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	L427 G430 F431 L434 I533 L578 F581 W582	L426 G429 F430 L433 I532 L577 F580 W581
BS02	CLA	B	H682 T685	H681 T684
BS03	SF4	B	C559 G561 C568	C558 G560 C567
BS04	CLA	B	W648 L651 L655 A658	W647 L650 L654 A657
BS05	CLA	B	D441 W582 N585 W589 L616 L620	D440 W581 N584 W588 L615 L619
BS06	CLA	B	W589 F650 H654 W657 Y717 T720 Y721 F724	W588 F649 H653 W656 Y716 T719 Y720 F723
BS07	CLA	B	A658 T659 M662 Y670 W671	A657 T658 M661 Y669 W670
BS08	CLA	B	F8 A28 H29	F7 A27 H28
BS09	CLA	B	H29 F31 I46 H50 Q53 I330 L334 A337	H28 F30 I45 H49 Q52 I329 L333 A336
BS10	CLA	B	H29 Q53 W60 I382	H28 Q52 W59 I381
BS11	CLA	B	H67 W70	H66 W69
BS12	CLA	B	A88 H89 N114 S118 W646	A87 H88 N113 S117 W645
BS13	CLA	B	I91 D93 H95 F96 N114 V645	I90 D92 H94 F95 N113 V644
BS14	CLA	B	F47 F51 A152 L155 H156 W161 W167	F46 F50 A151 L154 H155 W160 W166
BS15	CLA	B	S173 H177 T293	S172 H176 T292
BS16	CLA	B	F47 H50 F51 W167 R174 H177 H178	F46 H49 F50 W166 R173 H176 H177
BS17	CLA	B	D134 F141 A189 W190 H193 V197 R208 W209 F212	D133 F140 A188 W189 H192 V196 R207 W208 F211
BS18	CLA	B	A189 T191 H196 P217 G221 L222	A188 T190 H195 P216 G220 L221
BS19	CLA	B	W230 A234 H275 L278 A279	W229 A233 H274 L277 A278
BS20	CLA	B	L257 G259 H275 H276 I280 H351 W497	L256 G258 H274 H275 I279 H350 W496
BS21	CLA	B	I127 S186 S187 W190 M273 H276 H277 I280	I126 S185 S186 W189 M272 H275 H276 I279
BS22	CLA	B	L179 F284 A287 M290 Y291	L178 F283 A286 M289 Y290
BS23	CLA	B	N176 S180 L285 H289 T293	N175 S179 L284 H288 T292
BS24	CLA	B	I286 H289 M290 I297 G298 H299	I285 H288 M289 I296 G297 H298
BS25	CLA	B	H299 L304 H308	H298 L303 H307
BS26	CLA	B	L305 H308 L315 H319 V407 L408	L304 H307 L314 H318 V406 L407
BS27	CLA	B	A171 R174 L175 H178 S340	A170 R173 L174 H177 S339
BS28	CLA	B	S346 L347 M383 L527 T530	S345 L346 M382 L526 T529
BS29	CLA	B	H351 S354	H350 S353
BS30	CLA	B	W60 S118 A370 H374 Y377 I378	W59 S117 A369 H373 Y376 I377
BS31	CLA	B	T345 V348 Y358 L371 H374 H375	T344 V347 Y357 L370 H373 H374
BS32	CLA	B	A26 H29 D30 L334 F381 G385 H389 Y555 F576	A25 H28 D29 L333 F380 G384 H388 Y554 F575
BS33	CLA	B	R314 L315 R410 M411 H414 H421	R313 L314 R409 M410 H413 H420
BS34	CLA	B	H421 W424	H420 W423
BS35	CLA	B	W424 F431 H432	W423 F430 H431
BS36	CLA	B	G435 H439 M443 K451	G434 H438 M442 K450
BS37	CLA	B	W462 H467 L478	W461 H466 L477
BS38	CLA	B	L477 A488 W493	L476 A487 W492
BS39	CLA	B	A460 I463 Q464 F509 H520 I523 Y593	A459 I462 Q463 F508 H519 I522 Y592
BS40	CLA	B	F428 P457 F459 A460 F517 H520 H521	F427 P456 F458 A459 F516 H519 H520
BS41	CLA	B	L422 A524 H528	L421 A523 H527
BS42	CLA	B	W22 H682 R694 P697	W21 H681 R693 P696
BS43	CLA	B	L655 H712	L654 H711
BS44	CLA	B	H308 T309 P310 P311	H307 T308 P309 P310
BS45	PQN	B	M662 F663 S666 R668 W671 A699 L700 A705	M661 F662 S665 R667 W670 A698 L699 A704
BS46	CLA	B	F459 W462	F458 W461

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:0009536 plastid
• GO:0009579 thylakoid
• GO:0016020 membrane

External links

• PDB: RCSB:7ew6, PDBe:7ew6, PDBj:7ew6
• PDBsum: 7ew6
• PubMed: 34879391
• UniProt: A1E9J0|PSAB_HORVU Photosystem I P700 chlorophyll a apoprotein A2 (Gene Name=psaB)