Structure of PDB 7blx Chain B

Receptor sequence

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

ATKLFPKFSQGLAQDPTTRRIWYGLAMAHDFESHDGMTEENLYQKIFASH
FGQLSIIFLWTSGNLFHVAWQGNFEQWVTDPVHIRPIAHAIWDPHFGQPA
VEAFTRGGASGPVNISTSGVYQWWYTIGMRTNQDLYVGSVFLALVSAIFL
FAGWLHLQPNFQPSLSWFKDAESRLNHHLSGLFGVSSLAWTGHLVHVAIP
ESRGQHVGWDNFLSVLPHPQGLTPFFTGNWAAYAQSPDTASHVFGTAQGS
GQAILTFLGGFHPQTQSLWLTDMAHHHLAIAVIFIVAGHMYRTNFGIGHR
MQAILEAHTPPSGSLGAGHKGLFDTVNNSLHFQLGLALASVGTITSLVAQ
HMYSLPPYAFQAIDFTTQAALYTHHQYIAGFIMCGAFAHGAIFFIRDYDP
EQNKGNVLARMLDHKEALISHLSWVSLFLGFHTLGLYVHNDVMQAFGTPE
KQILIEPVFAQWIQAAHGKALYGFDFLLSSKTSAAFANGQSLWLPGWLDA
INNNQNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDK
KDFGYSFPCDGPGRGGTCDISAYDAFYLAVFWMLNTIGWVTFYWHWKHLT
LWQGNVAQFDESSTYLMGWLRDYLWLNSSQLINGYNPFGMNSLSVWAWTF
LFGHLIYATGFMFLISWRGYWQELIETLVWAHEKTPLANLVYWKDKPVAL
SIVQARLVGLAHFSVGYIFTYAAFLIASTSGRF

3D structure

• PDB: 7blx Dimeric and high-resolution structures of Chlamydomonas Photosystem I from a temperature-sensitive Photosystem II mutant
• Chain: B
• Resolution: 3.15 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	V439 W583 N586 W590 L617	V438 W582 N585 W589 L616
BS02	CLA	B	S421 S424 W425 L428	S420 S423 W424 L427
BS03	SF4	B	C560 G562 C569 W668	C559 G561 C568 W667
BS04	CLA	B	S424 S427 L428 G431 F432 L533 I534 L579 F582 W583	S423 S426 L427 G430 F431 L532 I533 L578 F581 W582
BS05	CLA	B	K685 P687	K684 P686
BS06	CLA	B	L679 H683 V692	L678 H682 V691
BS07	CLA	B	Y438 A523 W590 F593 L617 W620 L625 I633 F651 H655 Y658 Y718 T721 Y722 F725	Y437 A522 W589 F592 L616 W619 L624 I632 F650 H654 Y657 Y717 T720 Y721 F724
BS08	CLA	B	W649 L652 F653 H655 L656 A659	W648 L651 F652 H654 L655 A658
BS09	CLA	B	A659 T660 F662 M663 Y671 W672	A658 T659 F661 M662 Y670 W671
BS10	CLA	B	F6 F9 A29 H30 Q54 I57	F5 F8 A28 H29 Q53 I56
BS11	CLA	B	H30 I47 S50 H51 L55 L331 H332 Q334 L335 A338	H29 I46 S49 H50 L54 L330 H331 Q333 L334 A337
BS12	CLA	B	H30 Q54 I58 W61	H29 Q53 I57 W60
BS13	CLA	B	W61 H68 W71 Q72	W60 H67 W70 Q71
BS14	CLA	B	W61 N65 A89 H90 S117 S119 V646 W647	W60 N64 A88 H89 S116 S118 V645 W646
BS15	CLA	B	H90 I92 W93 D94 H96 F97 N115 V646	H89 I91 W92 D93 H95 F96 N114 V645
BS16	CLA	B	F52 F152 A153 H157 F162 W168	F51 F151 A152 H156 F161 W167
BS17	CLA	B	W168 H178 N295	W167 H177 N294
BS18	CLA	B	F48 H51 F52 W168 S174 R175 H178 H179 L183 F184	F47 H50 F51 W167 S173 R174 H177 H178 L182 F183
BS19	CLA	B	M130 F142 A190 W191 H194 H197 V198 G209 W210 F213	M129 F141 A189 W190 H193 H196 V197 G208 W209 F212
BS20	CLA	B	L189 A190 T192 H197 L217 P218 L223	L188 A189 T191 H196 L216 P217 L222
BS21	CLA	B	W231 A232 L256 F258 H276 L279 A280 V283 I284	W230 A231 L255 F257 H275 L278 A279 V282 I283
BS22	CLA	B	F258 L269 D273 H276 H277 H352 W498	F257 L268 D272 H275 H276 H351 W497
BS23	CLA	B	W191 M274 H277 H278 I281 I345 V349 P358	W190 M273 H276 H277 I280 I344 V348 P357
BS24	CLA	B	L180 F285 A288 M291 Y292 I305	L179 F284 A287 M290 Y291 I304
BS25	CLA	B	H178 S181 V186 H290 F296 I298	H177 S180 V185 H289 F295 I297
BS26	CLA	B	V287 H290 M291 I298 G299 H300	V286 H289 M290 I297 G298 H299
BS27	CLA	B	H300 I305 H309	H299 I304 H308
BS28	CLA	B	L306 H320 L323 V408 M412	L305 H319 L322 V407 M411
BS29	CLA	B	A172 R175 H179 F184 M302 F324 L337 A338 S341 I345	A171 R174 H178 F183 M301 F323 L336 A337 S340 I344
BS30	CLA	B	S347 L348 Q351 Q377 M384 F388 L528 T531 T532 M584	S346 L347 Q350 Q376 M383 F387 L527 T530 T531 M583
BS31	CLA	B	T344 L348 H352 S355 F510	T343 L347 H351 S354 F509
BS32	CLA	B	W61 T118 S119 A371 T374 H375 I379 I719 F720 A723	W60 T117 S118 A370 T373 H374 I378 I718 F719 A722
BS33	CLA	B	W61 T62 G120 W124 T346 V349 M353 Y359 L372 H375 H376 I379	W60 T61 G119 W123 T345 V348 M352 Y358 L371 H374 H375 I378
BS34	CLA	B	A27 H30 D31 L335 L339 F382 G386 H390 Y556 Y574 F577 V716	A26 H29 D30 L334 L338 F381 G385 H389 Y555 Y573 F576 V715
BS35	CLA	B	S315 L316 R411 M412 H415 L419 H422	S314 L315 R410 M411 H414 L418 H421
BS36	CLA	B	H422 W425	H421 W424
BS37	CLA	B	W425 F429 H433	W424 F428 H432
BS38	CLA	B	W463 I464 H468 L479 W498	W462 I463 H467 L478 W497
BS39	CLA	B	L478 N489 W494	L477 N488 W493
BS40	CLA	B	Y354 A461 I464 Q465 F510 L511 H521 I524 V591 Y594 W595	Y353 A460 I463 Q464 F509 L510 H520 I523 V590 Y593 W594
BS41	CLA	B	F429 L430 P458 V459 F460 A461 F518 H521 H522	F428 L429 P457 V458 F459 A460 F517 H520 H521
BS42	CLA	B	L423 V426 H529 T532	L422 V425 H528 T531
BS43	CLA	B	W23 H683 V692 Y693 W694 K695 P698	W22 H682 V691 Y692 W693 K694 P697
BS44	CLA	B	L656 F664 H713	L655 F663 H712
BS45	CLA	B	H309 T310 P311 S315	H308 T309 P310 S314
BS46	CLA	B	K8 K46 I57 L158	K7 K45 I56 L157
BS47	PQN	B	M663 F664 S667 W668 R669 W672 A700 L701 A706	M662 F663 S666 W667 R668 W671 A699 L700 A705
BS48	CA	B	E202 H207	E201 H206
BS49	CLA	B	G436 V439 H440 M444 K452 I454	G435 V438 H439 M443 K451 I453
BS50	CLA	B	F460 W463	F459 W462

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