Structure of PDB 7fix Chain A3

Receptor sequence

>7fixA3 (length=745) Species: 197221 (Thermosynechococcus vestitus BP-1)

KVRVVVDNDPVPTSFEKWAKPGHFDRTLARGPQTTTWIWNLHALAHDFDT
HTSDLEDISRKIFSAHFGHLAVVFIWLSGMYFHGAKFSNYEAWLADPTGI
KPSAQVVWPIVGQGILNGDVGGGFHGIQITSGLFQLWRASGITNEFQLYC
TAIGGLVMAGLMLFAGWFHYHKRAPKLEWFQNVESMLNHHLAGLLGLGSL
AWAGHQIHVSLPINKLLDAGVAAKDIPLPHEFILNPSLMAELYPKVDWGF
FSGVIPFFTFNWAAYSDFLTFNGGLNPVTGGLWLSDTAHHHLAIAVLFII
AGHMYRTNWGIGHSLKEILEAHKGPFTGAGHKGLYEVLTTSWHAQLAINL
AMMGSLSIIVAQHMYAMPPYPYLATDYPTQLSLFTHHMWIGGFLVVGGAA
HGAIFMVRDYDPAMNQNNVLDRVLRHRDAIISHLNWVCIFLGFHSFGLYV
HNDTMRAFGRPQDMFSDTGIQLQPVFAQWVQNLHTLAPGGTAPNAAATAS
VAFGGDVVAVGGKVAMMPIVLGTADFMVHHIHAFTIHVTVLILLKGVLFA
RSSRLIPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYNCISVVI
FHFSWKMQSDVWGTVAPDGTVSHITGGNFAQSAITINGWLRDFLWAQASQ
VIGSYGSALSAYGLLFLGAHFIWAFSLMFLFSGRGYWQELIESIVWAHNK
LKVAPAIQPRALSIIQGRAVGVAHYLLGGIATTWAFFLARIISVG

3D structure

• PDB: 7fix Structure of cyanobacterial photosystem I complexed with ferredoxin at 1.97 angstrom resolution.
• Chain: A3
• Resolution: 1.97 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	CL0	A3	I541 F544 Y603 S607 V608 F611 W649 L654 A658 F676 H680 W683 T742 T743 F746	I531 F534 Y593 S597 V598 F601 W639 L644 A648 F666 H670 W673 T732 T733 F736
BS02	CLA	A3	F456 F544 W601 N604 I646 Y735	F446 F534 W591 N594 I636 Y725
BS03	CLA	A3	I48 W49 L51 H52	I38 W39 L41 H42
BS04	CLA	A3	W28 H33 F34 A55 H56 F58 G78	W18 H23 F24 A45 H46 F48 G68
BS05	CLA	A3	H56 F58 I72 A75 H76 H79 V83 F84 W352 H353 L356 N359	H46 F48 I62 A65 H66 H69 V73 F74 W342 H343 L346 N349
BS06	CLA	A3	H56 H79 V83 W86 L404	H46 H69 V73 W76 L394
BS07	CLA	A3	W86 G89 F92 H93 F97 W118	W76 G79 F82 H83 F87 W108
BS08	CLA	A3	W86 M90 A114 Q115 I139 S141 Y672	W76 M80 A104 Q105 I129 S131 Y662
BS09	CLA	A3	Q115 W118 Q123 L126	Q105 W108 Q113 L116
BS10	CLA	A3	F77 A175 F178 H179 R183 W189	F67 A165 F168 H169 R173 W179
BS11	CLA	A3	V21 T23 S24 K27 W28 H33 K71 S74 G176 W177 Y180 H181	V11 T13 S14 K17 W18 H23 K61 S64 G166 W167 Y170 H171
BS12	CLA	A3	V12 V14 W189 S195 H199	V2 V4 W179 S185 H189
BS13	CLA	A3	F73 H76 F77 L80 W189 M196 H199 H200 L204	F63 H66 F67 L70 W179 M186 H189 H190 L194
BS14	CLA	A3	Q157 A211 W212 H215 V219 P239	Q147 A201 W202 H205 V209 P229
BS15	CLA	A3	H218 W258 G259 G263 V264 L302	H208 W248 G249 G253 V254 L292
BS16	CLA	A3	F156 C160 H240 L244	F146 C150 H230 L234
BS17	CLA	A3	W272 L302 N504	W262 L292 N494
BS18	CLA	A3	F281 L292 D296 T297 H299 H300 H373 M377	F271 L282 D286 T287 H289 H290 H363 M367
BS19	CLA	A3	L205 W212 H300 H301 I304 F308 L366 V370 M374 Y380	L195 W202 H290 H291 I294 F298 L356 V360 M364 Y370
BS20	CLA	A3	H199 L207 H313 T317 W319 I321	H189 L197 H303 T307 W309 I311
BS21	CLA	A3	L201 F308 A311 M314 Y315	L191 F298 A301 M304 Y305
BS22	CLA	A3	I310 H313 M314 G322 H323	I300 H303 M304 G312 H313
BS23	CLA	A3	H323 A331 H332	H313 A321 H322
BS24	CLA	A3	L329 H332 H341 L344 V429 L430	L319 H322 H331 L334 V419 L420
BS25	CLA	A3	V193 M196 L197 H200 L348 Q355 I358 N359 M362 M363	V183 M186 L187 H190 L338 Q345 I348 N349 M352 M353
BS26	CLA	A3	I368 I369 Q372 V405 I546 V550	I358 I359 Q362 V395 I536 V540
BS27	CLA	A3	I369 H373 A376 M377 F513	I359 H363 A366 M367 F503
BS28	CLA	A3	W86 T395 H396 W399 I400 I740 W744	W76 T385 H386 W389 I390 I730 W734
BS29	CLA	A3	G142 S367 V370 M374 Y380 L393 H396 H397 I400	G132 S357 V360 M364 Y370 L383 H386 H387 I390
BS30	CLA	A3	A53 H56 D57 L356 L360 F403 G407 H411 I414 R418 F574 R575 W592	A43 H46 D47 L346 L350 F393 G397 H401 I404 R408 F564 R565 W582
BS31	CLA	A3	F336 T337 R432 V433 H436 I440 H443	F326 T327 R422 V423 H426 I430 H433
BS32	CLA	A3	H443 W446	H433 W436
BS33	CLA	A3	W446 F450 F453 H454	W436 F440 F443 H444
BS34	CLA	A3	F453 H454 V460 H461 M465 R470 D473 F475 I480	F443 H444 V450 H451 M455 R460 D463 F465 I470
BS35	CLA	A3	H494 A497 T501 A509	H484 A487 T491 A499
BS36	CLA	A3	F281 T501 P503 N504	F271 T491 P493 N494
BS37	CLA	A3	Q372 F486 A487 Q491 I529 H539 H542 V609 H612 K616	Q362 F476 A477 Q481 I519 H529 H532 V599 H602 K606
BS38	CLA	A3	L451 P484 F486 A487 F536 H539 H540	L441 P474 F476 A477 F526 H529 H530
BS39	CLA	A3	L444 I546 H547	L434 I536 H537
BS40	CLA	A3	I704 A707 H708	I694 A697 H698
BS41	CLA	A3	T45 I48 H708 P715 P719	T35 I38 H698 P705 P709
BS42	CLA	A3	W49 I682 F685 L722 V730 A733 H734	W39 I672 F675 L712 V720 A723 H724
BS43	CLA	A3	W446 I449	W436 I439
BS44	CLA	A3	P335 F336	P325 F326
BS45	PQN	A3	M688 F689 S692 R694 W697 A721 L722 G727	M678 F679 S682 R684 W687 A711 L712 G717
BS46	SF4	A3	C578 G580 P581 C587 I724	C568 G570 P571 C577 I714
BS47	CLA	A3	N445 I449 G452 F453 F456 F544 V548 I552 F600 W601	N435 I439 G442 F443 F446 F534 V538 I542 F590 W591
BS48	CLA	A3	F681 A684 F685 L687 M688 Y696 W697	F671 A674 F675 L677 M678 Y686 W687
BS49	CLA	A3	L674 L677 G678 H680 F681 W683 A684	L664 L667 G668 H670 F671 W673 A674
BS50	CLA	A3	L650 L654 W655	L640 L644 W645
BS51	CLA	A3	T464 A467 F468	T454 A457 F458
BS52	CLA	A3	F268 F270	F258 F260

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:7fix, PDBe:7fix, PDBj:7fix
• PDBsum: 7fix
• PubMed: 36097054
• UniProt: P0A405|PSAA_THEVB Photosystem I P700 chlorophyll a apoprotein A1 (Gene Name=psaA)