Structure of PDB 4xk8 Chain A

Receptor sequence

>4xk8A (length=742) Species: 3888 (Pisum sativum)

EVKILVDRDPIKTSFEQWAKPGHFSRTIAKGPDTTTWIWNLHADAHDFDS
HTSDLEEISRKVFSAHFGQLSIIFLWLSGMYFHGARFSNYEAWLNDPTHI
KPSAQVVWPIVGQEILNGDVGGGFRGIQITSGFFQIWRASGITSELQLYC
TAIGALVFAGLMLFAGWFHYHKAAPKLAWFQDVESMLNHHLAGLLGLGSL
SWAGHQVHVSLPINQFLNAGVDPKEIPLPHEFILNRDLLAQLYPSFAEGA
TPFFTLNWSKYADFLTFRGGLDPLTGGLWLTDIAHHHLAIAILFLIAGHM
YRTNWGIGHGIKDILEAHKGPFTGQGHKGLYEILTTSWHAQLSINLAMLG
SLTIVVAQHMYSMPPYPYLATDYATQLSLFTHHMWIGGFLIVGAAAHAAI
FMVRDYDPTTRYNDLLDRVLRHRDAIISHLNWVCIFLGFHSFGLYIHNDT
MSALGRPQDMFSDTAIQLQPVFAQWIQNTHALAPGTTAPGATASTSLTWG
GGDLVAVGGKVALLPIPLGTADFLVHHIHAFTIHVTVLILLKGVLFARSS
RLIPDKANLGFRFPCDGPGRGGTCQVSAWDHVFLGLFWMYNSISVVIFHF
SWKMQSDVWGTINDQGVVTHITAGNFAQSSITINGWLRDFLWAQASQVIQ
SYGSSLSAYGLFFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKV
APATQPRALSIVQGRAVGVTHYLLGGIATTWAFFLARIIAVG

3D structure

• PDB: 4xk8 Structural basis for energy transfer pathways in the plant PSI-LHCI supercomplex
• Chain: A
• Resolution: 2.8 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	A	I544 Y606 S610 F614 W652 L657 F679 H683 W686 Y738 T745 T746 F749	I528 Y590 S594 F598 W636 L641 F663 H667 W670 Y722 T729 T730 F733
BS02	CLA	A	F684 A687 F688 L690 M691 Y699 W700	F668 A671 F672 L674 M675 Y683 W684
BS03	CLA	A	F458 I462 F547 W604 N607 I649 W686 Y738	F442 I446 F531 W588 N591 I633 W670 Y722
BS04	CLA	A	P37 I54 L57 H58	P21 I38 L41 H42
BS05	CLA	A	W34 F40 L57 A61 H62 G84 I88	W18 F24 L41 A45 H46 G68 I72
BS06	CLA	A	H62 F64 V78 A81 H82 Q85 I89 F90 W354 H355 Q357 L358 N361	H46 F48 V62 A65 H66 Q69 I73 F74 W338 H339 Q341 L342 N345
BS07	CLA	A	H62 Q85 I89 W92 L406	H46 Q69 I73 W76 L390
BS08	CLA	A	S94 G95 F98 H99 F103 W124	S78 G79 F82 H83 F87 W108
BS09	CLA	A	M96 A120 Q121 I145 T146 S147 Y675	M80 A104 Q105 I129 T130 S131 Y659
BS10	CLA	A	V123 W124 I126 V127 Q129	V107 W108 I110 V111 Q113
BS11	CLA	A	I20 V22 F83 A181 F184 H185 W195	I4 V6 F67 A165 F168 H169 W179
BS12	CLA	A	T29 S30 F31 Q33 W34 H39 K77 S80 L179 G182 W183 Y186 H187	T13 S14 F15 Q17 W18 H23 K61 S64 L163 G166 W167 Y170 H171
BS13	CLA	A	V18 I20 W195 D198 H205	V2 I4 W179 D182 H189
BS14	CLA	A	F79 H82 F83 M178 W195 F196 M202 H205 H206 L210	F63 H66 F67 M162 W179 F180 M186 H189 H190 L194
BS15	CLA	A	G157 I158 Q163 T167 S217 W218 H221 H224 V225 P245	G141 I142 Q147 T151 S201 W202 H205 H208 V209 P229
BS16	CLA	A	L216 S217 G220 V223 H224 I249 R252 F262 G265 Y277 L304	L200 S201 G204 V207 H208 I233 R236 F246 G249 Y261 L288
BS17	CLA	A	C166 H246 L250	C150 H230 L234
BS18	CLA	A	W274 A278 L281 T282 H301 L304 A305 I308 I312	W258 A262 L265 T266 H285 L288 A289 I292 I296
BS19	CLA	A	F283 D298 H301 H302 A305 I306 H375 M379 P381 T511	F267 D282 H285 H286 A289 I290 H359 M363 P365 T495
BS20	CLA	A	L211 G214 S215 W218 H302 H303 I306 L368 V372 P381 Y382	L195 G198 S199 W202 H286 H287 I290 L352 V356 P365 Y366
BS21	CLA	A	N204 H205 A208 G209 L213 H315 T319 W321	N188 H189 A192 G193 L197 H299 T303 W305
BS22	CLA	A	L207 L309 F310 A313 M316 Y317 M364	L191 L293 F294 A297 M300 Y301 M348
BS23	CLA	A	I312 M316 G324 H325	I296 M300 G308 H309
BS24	CLA	A	H325 I330 A333 H334	H309 I314 A317 H318
BS25	CLA	A	H334 H343 L346 L431	H318 H327 L330 L415
BS26	CLA	A	M202 L203 H206 L350 T351 W354 Q357 I360 N361 M364	M186 L187 H190 L334 T335 W338 Q341 I344 N345 M348
BS27	CLA	A	I370 V371 Q374 I407 I549 T552 V553	I354 V355 Q358 I391 I533 T536 V537
BS28	CLA	A	M364 L368 Q374 H375 S378 M379 W515	M348 L352 Q358 H359 S362 M363 W499
BS29	CLA	A	W92 S394 T397 H398 W401 F678 I743 W747	W76 S378 T381 H382 W385 F662 I727 W731
BS30	CLA	A	W92 S147 F149 I152 T369 M376 Y382 L395 H398 H399 I402	W76 S131 F133 I136 T353 M360 Y366 L379 H382 H383 I386
BS31	CLA	A	A59 H62 D63 L362 F405 G409 A412 H413 I416 R420 F577 R578 W595	A43 H46 D47 L346 F389 G393 A396 H397 I400 R404 F561 R562 W579
BS32	CLA	A	F338 T339 R434 H438 I442 H445	F322 T323 R418 H422 I426 H429
BS33	CLA	A	H445 W448	H429 W432
BS34	CLA	A	W448 I451 F452 F455 H456	W432 I435 F436 F439 H440
BS35	CLA	A	F455 G459 L460 I462 H463 M467 R472 D475	F439 G443 L444 I446 H447 M451 R456 D459
BS36	CLA	A	W491 I492 H496 A499 T503 A504	W475 I476 H480 A483 T487 A488
BS37	CLA	A	F283 T503 P505 G506	F267 T487 P489 G490
BS38	CLA	A	F488 A489 I492 Q493 W515 I532 H542 H545 V612 H615 K619	F472 A473 I476 Q477 W499 I516 H526 H529 V596 H599 K603
BS39	CLA	A	L453 P486 F488 A489 D538 F539 H542 H543	L437 P470 F472 A473 D522 F523 H526 H527
BS40	CLA	A	L446 V449 I549 H550	L430 V433 I533 H534
BS41	CLA	A	I707 A710 H711	I691 A694 H695
BS42	CLA	A	W55 F688 L725 Q729 V733 T736 H737	W39 F672 L709 Q713 V717 T720 H721
BS43	CLA	A	W448 I451	W432 I435
BS44	PQN	A	M691 F692 S695 R697 W700 A724 L725	M675 F676 S679 R681 W684 A708 L709
BS45	CLA	A	K335 P337 F338	K319 P321 F322
BS46	SF4	A	C581 C590	C565 C574
BS47	CLA	A	L677 L680 G681 F684 A687	L661 L664 G665 F668 A671
BS48	CLA	A	L653 L657 W658	L637 L641 W642
BS49	CLA	A	N447 I451 F455 F547 L554 I555 F603 W604	N431 I435 F439 F531 L538 I539 F587 W588
BS50	CLA	A	A469 L470	A453 L454
BS51	CLA	A	W709 L714	W693 L698
BS52	CLA	A	T51 W55 H711 P718 P722	T35 W39 H695 P702 P706
BS53	CLA	A	F269 F270	F253 F254

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:4xk8, PDBe:4xk8, PDBj:4xk8
• PDBsum: 4xk8
• PubMed: 26023133
• UniProt: P05310|PSAA_PEA Photosystem I P700 chlorophyll a apoprotein A1 (Gene Name=psaA)