Structure of PDB 6trc Chain a

Receptor sequence

>6trca (length=746) Species: 197221 (Thermosynechococcus vestitus BP-1)

PKVRVVVDNDPVPTSFEKWAKPGHFDRTLARGPQTTTWIWNLHALAHDFD
THTSDLEDISRKIFSAHFGHLAVVFIWLSGMYFHGAKFSNYEAWLADPTG
IKPSAQVVWPIVGQGILNGDVGGGFHGIQITSGLFQLWRASGITNEFQLY
CTAIGGLVMAGLMLFAGWFHYHKRAPKLEWFQNVESMLNHHLAGLLGLGS
LAWAGHQIHVSLPINKLLDAGVAAKDIPLPHEFILNPSLMAELYPKVDWG
FFSGVIPFFTFNWAAYSDFLTFNGGLNPVTGGLWLSDTAHHHLAIAVLFI
IAGHMYRTNWGIGHSLKEILEAHKGPFTGAGHKGLYEVLTTSWHAQLAIN
LAMMGSLSIIVAQHMYAMPPYPYLATDYPTQLSLFTHHMWIGGFLVVGGA
AHGAIFMVRDYDPAMNQNNVLDRVLRHRDAIISHLNWVCIFLGFHSFGLY
VHNDTMRAFGRPQDMFSDTGIQLQPVFAQWVQNLHTLAPGGTAPNAAATA
SVAFGGDVVAVGGKVAMMPIVLGTADFMVHHIHAFTIHVTVLILLKGVLF
ARSSRLIPDKANLGFRFPCDGPGRGGTCQVSGWDHVFLGLFWMYNCISVV
IFHFSWKMQSDVWGTVAPDGTVSHITGGNFAQSAITINGWLRDFLWAQAS
QVIGSYGSALSAYGLLFLGAHFIWAFSLMFLFSGRGYWQELIESIVWAHN
KLKVAPAIQPRALSIIQGRAVGVAHYLLGGIATTWAFFLARIISVG

3D structure

• PDB: 6trc Current limits of structural biology: The transient interaction between cytochrome c6 and photosystem I
• Chain: a
• Resolution: 2.98 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	a	I541 Y603 N604 W649 F676 H680 W683 Y735 T742 T743 F746	I532 Y594 N595 W640 F667 H671 W674 Y726 T733 T734 F737
BS02	CLA	a	F681 A684 F685 M688 Y696 W697	F672 A675 F676 M679 Y687 W688
BS03	CLA	a	F456 D463 W601 N604 I646	F447 D454 W592 N595 I637
BS04	CLA	a	W28 H33 F34 H52 A55 H56	W19 H24 F25 H43 A46 H47
BS05	CLA	a	H56 I72 A75 H76 H79 F84 W352 H353 Q355 L356 N359	H47 I63 A66 H67 H70 F75 W343 H344 Q346 L347 N350
BS06	CLA	a	H79 W86	H70 W77
BS07	CLA	a	G89 F92 H93 F97 V116 W118	G80 F83 H84 F88 V107 W109
BS08	CLA	a	M90 Q115 I139 T140 S141 A671 Y672	M81 Q106 I130 T131 S132 A662 Y663
BS09	CLA	a	Q115 V116 V117 W118 Q123 A671	Q106 V107 V108 W109 Q114 A662
BS10	CLA	a	F77 F174 A175 F178 H179 R183 W189	F68 F165 A166 F169 H170 R174 W180
BS11	CLA	a	S24 F25 K27 W28 H33 K71 S74 G176 W177 Y180 H181	S15 F16 K18 W19 H24 K62 S65 G167 W168 Y171 H172
BS12	CLA	a	R13 V14 W189 N192 H199	R4 V5 W180 N183 H190
BS13	CLA	a	F73 H76 F77 L80 M172 W189 F190 H199 H200 G203 L204	F64 H67 F68 L71 M163 W180 F181 H190 H191 G194 L195
BS14	CLA	a	Q157 C160 T161 A211 W212 H215 V219 P239	Q148 C151 T152 A202 W203 H206 V210 P230
BS15	CLA	a	G214 I217 H218 M249 W258 G259 F260	G205 I208 H209 M240 W249 G250 F251
BS16	CLA	a	F156 L171 H240 I243 L244	F147 L162 H231 I234 L235
BS17	CLA	a	F267 W272 Y275 L279 H299 L302 A303	F258 W263 Y266 L270 H290 L293 A294
BS18	CLA	a	G283 L292 D296 T297 H300 I304 H373 M377 P379 A509	G274 L283 D287 T288 H291 I295 H364 M368 P370 A500
BS19	CLA	a	L205 W212 H300 H301 I304 P379 Y380	L196 W203 H291 H292 I295 P370 Y371
BS20	CLA	a	H199 I309 H313 T317 W319 I321	H190 I300 H304 T308 W310 I312
BS21	CLA	a	L205 F308 M314 Y315 I328 M362	L196 F299 M305 Y306 I319 M353
BS22	CLA	a	I310 H313 M314 I321 G322 H323	I301 H304 M305 I312 G313 H314
BS23	CLA	a	H323 H332	H314 H323
BS24	CLA	a	H332 H341 L344 V429	H323 H332 L335 V420
BS25	CLA	a	M196 L348 T349 T350 W352 I358 N359 M363	M187 L339 T340 T341 W343 I349 N350 M354
BS26	CLA	a	I368 Q372 M398 V405 V550	I359 Q363 M389 V396 V541
BS27	CLA	a	I369 Q372 H373 A376 M377 S510 F513	I360 Q363 H364 A367 M368 S501 F504
BS28	CLA	a	W86 S141 S392 T395 H396 W399 W744	W77 S132 S383 T386 H387 W390 W735
BS29	CLA	a	W86 L146 M363 L366 V370 Y380 H396 H397	W77 L137 M354 L357 V361 Y371 H387 H388
BS30	CLA	a	A53 H56 D57 F403 G407 H411 I414 R575 W592	A44 H47 D48 F394 G398 H402 I405 R566 W583
BS31	CLA	a	F336 V429 R432 H436 H443	F327 V420 R423 H427 H434
BS32	CLA	a	W446 F450 F453 H454	W437 F441 F444 H445
BS33	CLA	a	F453 G457 H461 T464 M465 R470 D473	F444 G448 H452 T455 M456 R461 D464
BS34	CLA	a	W489 L493 H494 A497 T501	W480 L484 H485 A488 T492
BS35	CLA	a	F281 T501 P503 N504	F272 T492 P494 N495
BS36	CLA	a	Q372 F486 A487 Q491 I529 H539 H542 H612 K616	Q363 F477 A478 Q482 I520 H530 H533 H603 K607
BS37	CLA	a	W446 L451 P484 F486 A487 H539 H540	W437 L442 P475 F477 A478 H530 H531
BS38	CLA	a	I546 H547	I537 H538
BS39	CLA	a	I704 H708	I695 H699
BS40	CLA	a	W49 I682 F685 V730 H734	W40 I673 F676 V721 H725
BS41	CLA	a	N445 W446	N436 W437
BS42	CLA	a	H332 K333 P335 F336	H323 K324 P326 F327
BS43	PQN	a	M688 F689 R694 W697 A721 L722	M679 F680 R685 W688 A712 L713
BS44	SF4	a	C578 G580 C587	C569 G571 C578
BS45	CLA	a	L674 L677 F681 A684	L665 L668 F672 A675
BS46	CLA	a	L650 L654	L641 L645
BS47	CLA	a	I449 F544 W601	I440 F535 W592
BS48	CLA	a	T45 H708 P715 P719	T36 H699 P706 P710
BS49	CLA	a	P31 I48 H52	P22 I39 H43
BS50	CLA	a	F268 F270	F259 F261

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:6trc, PDBe:6trc, PDBj:6trc
• PDBsum: 6trc
• UniProt: P0A405|PSAA_THEVB Photosystem I P700 chlorophyll a apoprotein A1 (Gene Name=psaA)