Structure of PDB 7blz Chain B

Receptor sequence

>7blzB (length=731) Species: 280699 (Cyanidioschyzon merolae strain 10D)

ATKFPKFSQALASDPTTRRIWYGIATAHDFESHDGMTEENLYQKIFASHF
GHLAIIFLWTSGNLFHVAWQGNFEQWVANPLKTKPLAHAIWDPHFGQAAL
KAFTRGDTVANISYSGVYHWWYTIGIRNNVELYTGALGLLVLSAVFLLAG
WLHIQPKFKPSLSWFKNNESRLNHHLAGLFGVSSLAWTGHLVHVAIPASR
GQHVGWDNFIMTPPHPAGLQPFFTGNWSVYAQSPDSMQHVFGTSQGAGTA
ILTFLGGFHPQTQSLWLTDMAHHHLAIAVIFIVAGHMYRTNFGIGHNLKT
ILEAHRPPSGRLGKGHIGIYQTLTNSLHFQLGLALASLSVVTSLVAQHMY
AMPPYAYMAFDYVTQSALYTHHQYIAGLLIVGAFAHGAIFFIRDYDPEQN
QDNVLARMLAHKEAVISHLSWVSLFLGFHTLGLYVHNDVVVAFGNPEKQI
LIEPIFAQWIQATSGKMLYGFQVLLSSSTSNASVAAQQLWLPGWLEAVNN
ESNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKDF
GYSFPCDGPGRGGTCDISAWDAFYLAMFWMLNTIGWVTFYWHWKHLSLWQ
GNVAQFNESSTYLMGWLRDYLWLNSSPLINGYNPYGMNSLAVWSWMFLFA
HLVWATGFMFLISWRGYWQELIETLAWAHERTPLANLIRWKDKPVALSIV
QARLVGLVHFTVGYILTYAAFVIASTAGKFS

3D structure

• PDB: 7blz Red alga C.merolae Photosystem I
• Chain: B
• Resolution: 3.1 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	peptide	B	F66 A69 W70 Y134 L138 L141 A145 L148 W152 Q156	F65 A68 W69 Y133 L137 L140 A144 L147 W151 Q155
BS02	CL0	B	L618 L622 W623	L617 L621 W622
BS03	CLA	B	V440 F444	V439 F443
BS04	CLA	B	H680 I689	H679 I688
BS05	SF4	B	C557 C566 W665	C556 C565 W664
BS06	CLA	B	S424 L425 G428 F429 I531 L576 F579 W580	S423 L424 G427 F428 I530 L575 F578 W579
BS07	CLA	B	W646 L649 F650 H652 L653 W655 A656	W645 L648 F649 H651 L652 W654 A655
BS08	CLA	B	W422 L425	W421 L424
BS09	CLA	B	L653 A656 T657 F659 M660 I663 Y668 W669	L652 A655 T656 F658 M659 I662 Y667 W668
BS10	CLA	B	R312 H419 W422	R311 H418 W421
BS11	CLA	B	D439 W580 N583 W587 L614 W655	D438 W579 N582 W586 L613 W654
BS12	CLA	B	L432 Y435 A520 W587 F590 L614 W617 L622 S626 I630 F648 H652 W655 Y715 T718 Y719 F722	L431 Y434 A519 W586 F589 L613 W616 L621 S625 I629 F647 H651 W654 Y714 T717 Y718 F721
BS13	CLA	B	A28 H29 I56	A27 H28 I55
BS14	CLA	B	H29 F31 I46 S49 H50 H53 L54 R172 L328 H329 Q331 L332	H28 F30 I45 S48 H49 H52 L53 R171 L327 H328 Q330 L331
BS15	CLA	B	H29 H53 I57 W60 L379	H28 H52 I56 W59 L378
BS16	CLA	B	N64 A88 H89 N112 I113 S114 Y115 S116 V643 W644	N63 A87 H88 N111 I112 S113 Y114 S115 V642 W643
BS17	CLA	B	I91 W92 D93 H95 F96 V643 W646	I90 W91 D92 H94 F95 V642 W645
BS18	CLA	B	F51 L143 A150 L153 H154 F159 W165	F50 L142 A149 L152 H153 F158 W164
BS19	CLA	B	W165 H175 N292 F293	W164 H174 N291 F292
BS20	CLA	B	F47 H50 F51 L54 W121 W165 F166 R172 H175 H176 L180 F181	F46 H49 F50 L53 W120 W164 F165 R171 H174 H175 L179 F180
BS21	CLA	B	G126 E132 G136 V146 A187 W188 H191 V195 G206 W207 F210	G125 E131 G135 V145 A186 W187 H190 V194 G205 W206 F209
BS22	CLA	B	H194 P214 P215 G219 L220 F223 F224 L253	H193 P213 P214 G218 L219 F222 F223 L252
BS23	CLA	B	F223 W228 L253 F255 H273 L276 A277 V280	F222 W227 L252 F254 H272 L275 A276 V279
BS24	CLA	B	F255 G257 L266 H273 H274 I278 I281 H349 M353 W491 W495	F254 G256 L265 H272 H273 I277 I280 H348 M352 W490 W494
BS25	CLA	B	I125 F181 S184 W188 M271 H274 H275 L345 V346 P355 Y356	I124 F180 S183 W187 M270 H273 H274 L344 V345 P354 Y355
BS26	CLA	B	L173 L177 F282 A285 M288 Y289 L299 I302	L172 L176 F281 A284 M287 Y288 L298 I301
BS27	CLA	B	H175 A178 G179 V183 H287 T291 F293 I295	H174 A177 G178 V182 H286 T290 F292 I294
BS28	CLA	B	V284 M288 H297	V283 M287 H296
BS29	CLA	B	H297 A305 H306	H296 A304 H305
BS30	CLA	B	L303 H306 H317 V405	L302 H305 H316 V404
BS31	CLA	B	N169 R172 L173 F282 L299 Y321 L324 A335 S338 V342	N168 R171 L172 F281 L298 Y320 L323 A334 S337 V341
BS32	CLA	B	S344 L345 Q348 I381 F385 L525 T528 T529	S343 L344 Q347 I380 F384 L524 T527 T528
BS33	CLA	B	S338 V341 L345 Q348 H349 A352 M353	S337 V340 L344 Q347 H348 A351 M352
BS34	CLA	B	W60 S116 A368 T371 H372 Y375 M647 I716 A720	W59 S115 A367 T370 H371 Y374 M646 I715 A719
BS35	CLA	B	W60 T61 W121 S184 L339 V342 T343 V346 M350 Y356 H372 H373 I376	W59 T60 W120 S183 L338 V341 T342 V345 M349 Y355 H371 H372 I375
BS36	CLA	B	A26 H29 D30 L332 L379 G383 H387 W571 F574 V709	A25 H28 D29 L331 L378 G382 H386 W570 F573 V708
BS37	CLA	B	R312 L313 V405 R408 M409 H412 H419	R311 L312 V404 R407 M408 H411 H418
BS38	CLA	B	G433 V436 H437 K449 I451	G432 V435 H436 K448 I450
BS39	CLA	B	W460 I461 S465 L475 L476 W495 F507	W459 I460 S464 L474 L475 W494 F506
BS40	CLA	B	L475 A483 A486 L490 W491	L474 A482 A485 L489 W490
BS41	CLA	B	Q348 A458 W460 I461 Q462 L475 H518 I521 L525 V588 Y591 W592	Q347 A457 W459 I460 Q461 L474 H517 I520 L524 V587 Y590 W591
BS42	CLA	B	F426 L427 P455 I456 F457 A458 F515 H518 H519	F425 L426 P454 I455 F456 A457 F514 H517 H518
BS43	CLA	B	H419 L420 V423 H526	H418 L419 V422 H525
BS44	CLA	B	T18 W22 H680 R690 K692 P695	T17 W21 H679 R689 K691 P694
BS45	CLA	B	F650 V654 T657 F661 L698 V706 H710	F649 V653 T656 F660 L697 V705 H709
BS46	CLA	B	H306 R307 P308 P309 R312 L313	H305 R306 P307 P308 R311 L312
BS47	PQN	B	I21 W22 M660 F661 S664 W665 R666 W669 A697 L698 A703	I20 W21 M659 F660 S663 W664 R665 W668 A696 L697 A702
BS48	CA	B	G126 E132 H204	G125 E131 H203
BS49	CA	B	G206 W207 D208 N209	G205 W206 D207 N208
BS50	CLA	B	W422 L425 F426 H430	W421 L424 F425 H429
BS51	CLA	B	F457 W460	F456 W459
BS52	CLA	B	I56 L59 W60 G63 H67 W70	I55 L58 W59 G62 H66 W69
BS53	CLA	B	R682 P684	R681 P683
BS54	CLA	B	T683 P684 L685	T682 P683 L684

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:7blz, PDBe:7blz, PDBj:7blz
• PDBsum: 7blz
• UniProt: Q85FY6|PSAB_CYAM1 Photosystem I P700 chlorophyll a apoprotein A2 (Gene Name=psaB)