Structure of PDB 6kig Chain A

Receptor sequence

>6kigA (length=751) Species: 1140 (Synechococcus elongatus PCC 7942 = FACHB-805)

KATVDKNPVPTSFEKWGKPGHFDRTLAKGPKTTTWIWNLHANAHDFDSHT
SDLEDISRKIFSAHFGHLAVIFIWLSGAYFHGARFSNFSGWLADPTHVKP
SAQVVWPIFGQEILNGDVGGGFHGIQITSGLFQLWRASGYTNEFQLYVTA
IGALVMAGLMLFAGWFHYHKAAPKLEWFQNVESMLNHHLAGLLGLGSLSW
AGHQIHVSLPVNKLLDAIDAGEPLVLNGKTIASAADIPLPHEFLDVSLIS
QLFPGFEAGVKAFFTLNWSAYADFLTFKGGLNPVTGGLWLTDTAHHHLAI
AVLFIVAGHMYRTNWGIGHSLKEILEAHKGPFTGQGHKGLYEILTTSWHA
QLSINLAILGSISIIVAHHMYAMPPYPYLATDYPTMLSLFTHHIWIGGFL
IVGAGAHAAIFMVRDYDPAKNVDNLLDRVLRHRDAIISHLNWVCIWLGFH
SFGLYIHNDTMRALGRPQDMFSDSAIQLQPIFAQWIQNIHALAPGNTAPN
ALASVSQVFGGDVVAVGGKVAAAPIVLGTADFMVHHIHAFTIHVTALILL
KGVLYARSSRLVPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYN
SLSIVIFHYSWKMQSDVWGSVLPDGSVAHIANGNFAQSALTINGWLRDFL
WAQASQVITSYGSSTSAYGLLFLGAHFVWAFSLMFLFSGRGYWQELIESI
VWAHNKLKVAPAIQPRALSIIQGRAVGVAHYLLGGIVTTWSFFLARIIAV
G

3D structure

• PDB: 6kig Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex.
• Chain: A
• Resolution: 2.9 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	Y467 I549 Y611 S615 I616 F619 I654 W657 F684 H688 W691 Y743 T750 T751 F754	Y455 I537 Y599 S603 I604 F607 I642 W645 F672 H676 W679 Y731 T738 T739 F742
BS02	CLA	A	F689 A692 F693 L695 M696 Y704 W705 L708	F677 A680 F681 L683 M684 Y692 W693 L696
BS03	CLA	A	F25 H33 F34 A55 H56 F58 H79	F13 H21 F22 A43 H44 F46 H67
BS04	CLA	A	H56 F58 I72 A75 H76 H79 L80 I83 W360 H361 Q363 L364 N367	H44 F46 I60 A63 H64 H67 L68 I71 W348 H349 Q351 L352 N355
BS05	CLA	A	H56 H79 V82 W86	H44 H67 V70 W74
BS06	CLA	A	W86 G89 F92 H93 F97 W118	W74 G77 F80 H81 F85 W106
BS07	CLA	A	Q115 I139 S141 Y680	Q103 I127 S129 Y668
BS08	CLA	A	I85 Q115 V117 W118 F121 Q123 L126 A679	I73 Q103 V105 W106 F109 Q111 L114 A667
BS09	CLA	A	F73 F77 A175 F178 H179 W189	F61 F65 A163 F166 H167 W177
BS10	CLA	A	T23 S24 F25 K27 W28 H33 K71 S74 L173 G176 W177 Y180 H181	T11 S12 F13 K15 W16 H21 K59 S62 L161 G164 W165 Y168 H169
BS11	CLA	A	K13 W189 N192 S195 H199 T325 N326 W327	K1 W177 N180 S183 H187 T313 N314 W315
BS12	CLA	A	F73 H76 F77 M172 W189 F190 M196 H199 H200 G203	F61 H64 F65 M160 W177 F178 M184 H187 H188 G191
BS13	CLA	A	S150 G151 Y152 Q157 V160 S211 W212 H215 V219 P252	S138 G139 Y140 Q145 V148 S199 W200 H203 V207 P240
BS14	CLA	A	G214 I217 H218 L256 F268 G271 V272 L310	G202 I205 H206 L244 F256 G259 V260 L298
BS15	CLA	A	F156 L251 H253 L256	F144 L239 H241 L244
BS16	CLA	A	W280 Y283 L287 H307 L310 A311 V314 N512	W268 Y271 L275 H295 L298 A299 V302 N500
BS17	CLA	A	F289 L300 D304 T305 H307 H308 A311 I312 H381 M385 V517	F277 L288 D292 T293 H295 H296 A299 I300 H369 M373 V505
BS18	CLA	A	L205 G208 S209 W212 H308 H309 F316 V378 P387 Y388	L193 G196 S197 W200 H296 H297 F304 V366 P375 Y376
BS19	CLA	A	N198 H199 A202 L207 H321 T325 W327 I329	N186 H187 A190 L195 H309 T313 W315 I317
BS20	CLA	A	L197 L201 L205 F316 A319 M322 Y323 L333 I336	L185 L189 L193 F304 A307 M310 Y311 L321 I324
BS21	CLA	A	V318 H321 M322 G330 H331	V306 H309 M310 G318 H319
BS22	CLA	A	H331 I336 A339 H340	H319 I324 A327 H328
BS23	CLA	A	L337 H340 H349 L437	L325 H328 H337 L425
BS24	CLA	A	F190 V193 M196 L197 H200 L356 T357 T358 W360 I366 N367 I370	F178 V181 M184 L185 H188 L344 T345 T346 W348 I354 N355 I358
BS25	CLA	A	I376 I377 H380 I413 I554	I364 I365 H368 I401 I542
BS26	CLA	A	I370 I377 H380 H381 A384 M385 F521	I358 I365 H368 H369 A372 M373 F509
BS27	CLA	A	W86 S141 S400 T403 H404 W407 I748 W752	W74 S129 S388 T391 H392 W395 I736 W740
BS28	CLA	A	G142 I374 V378 M382 Y388 L401 H404 H405 I408	G130 I362 V366 M370 Y376 L389 H392 H393 I396
BS29	CLA	A	H52 A53 H56 D57 L364 F411 G415 H419 I422 R426 F582 R583 W600	H40 A41 H44 D45 L352 F399 G403 H407 I410 R414 F570 R571 W588
BS30	CLA	A	F344 T345 R440 V441 H444 I448 H451	F332 T333 R428 V429 H432 I436 H439
BS31	CLA	A	W454 W458 F461 H462	W442 W446 F449 H450
BS32	CLA	A	F461 G465 I468 H469 M473 R478 F483	F449 G453 I456 H457 M461 R466 F471
BS33	CLA	A	W497 I498 I501 H502 T509 V517	W485 I486 I489 H490 T497 V505
BS34	CLA	A	F289 T509 P511 N512	F277 T497 P499 N500
BS35	CLA	A	H380 Y383 I498 Q499 I537 H547 H550 V617 H620 K624	H368 Y371 I486 Q487 I525 H535 H538 V605 H608 K612
BS36	CLA	A	W458 L459 P492 I493 F494 A495 F544 H547 H548 A551	W446 L447 P480 I481 F482 A483 F532 H535 H536 A539
BS37	CLA	A	L452 V455 I554 H555	L440 V443 I542 H543
BS38	CLA	A	I712 A715 H716	I700 A703 H704
BS39	CLA	A	T45 I48 W49 P723 P727	T33 I36 W37 P711 P715
BS40	CLA	A	F693 V738 H742 L745	F681 V726 H730 L733
BS41	CLA	A	W454 I457	W442 I445
BS42	CLA	A	P343 F344	P331 F332
BS43	CLA	A	F464 I468 D471 F552 W609 N612 I654 W691 Y743	F452 I456 D459 F540 W597 N600 I642 W679 Y731
BS44	CLA	A	I48 W49 L51 H52	I36 W37 L39 H40
BS45	CLA	A	H451 W454	H439 W442
BS46	PQN	A	M696 F697 S700 R702 W705 A729 L730 G735	M684 F685 S688 R690 W693 A717 L718 G723
BS47	SF4	A	C586 G588 P589 C595	C574 G576 P577 C583
BS48	CLA	A	L682 L685 H688 F689 A692	L670 L673 H676 F677 A680
BS49	CLA	A	L658 W663	L646 W651
BS50	CLA	A	N453 C456 I457 G460 F461 F552 L559 L605 F608 W609	N441 C444 I445 G448 F449 F540 L547 L593 F596 W597
BS51	CLA	A	T472 A475 L476	T460 A463 L464
BS52	CLA	A	F276 L278	F264 L266

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:0009522 photosystem I
• GO:0009579 thylakoid
• GO:0016020 membrane
• GO:0031676 plasma membrane-derived thylakoid membrane
• GO:0042651 thylakoid membrane

External links

• PDB: RCSB:6kig, PDBe:6kig, PDBj:6kig
• PDBsum: 6kig
• PubMed: 32042157
• UniProt: Q31LJ0|PSAA_SYNE7 Photosystem I P700 chlorophyll a apoprotein A1 (Gene Name=psaA)