Structure of PDB 6tra Chain A

Receptor sequence

>6traA (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: 6tra Current limits of structural biology: The transient interaction between cytochrome c6 and photosystem I
• Chain: A
• Resolution: 2.85 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 F544 Y603 N604 F611 I646 W649 F676 H680 W683 Y735 T742 T743 F746	I532 F535 Y594 N595 F602 I637 W640 F667 H671 W674 Y726 T733 T734 F737
BS02	CLA	A	F681 A684 F685 L687 M688 Y696 W697	F672 A675 F676 L678 M679 Y687 W688
BS03	CLA	A	F456 V460 F600 W601 N604 I646 Y735	F447 V451 F591 W592 N595 I637 Y726
BS04	CLA	A	P31 I48 H52	P22 I39 H43
BS05	CLA	A	W28 H33 F34 H52 A55 H56	W19 H24 F25 H43 A46 H47
BS06	CLA	A	H56 F58 I72 H76 H79 F84 W352 H353 Q355 L356 N359	H47 F49 I63 H67 H70 F75 W343 H344 Q346 L347 N350
BS07	CLA	A	H56 H79 W86 F403	H47 H70 W77 F394
BS08	CLA	A	W86 G89 F92 H93 F97 V116 W118	W77 G80 F83 H84 F88 V107 W109
BS09	CLA	A	M90 Q115 I139 S141 Y672	M81 Q106 I130 S132 Y663
BS10	CLA	A	Q115 V117 W118 Q123 L126 A671	Q106 V108 W109 Q114 L117 A662
BS11	CLA	A	F77 L171 F174 A175 F178 H179 R183 W189	F68 L162 F165 A166 F169 H170 R174 W180
BS12	CLA	A	T23 F25 K27 W28 H33 K71 S74 G176 W177 Y180 H181	T14 F16 K18 W19 H24 K62 S65 G167 W168 Y171 H172
BS13	CLA	A	R13 W189 H199 T317	R4 W180 H190 T308
BS14	CLA	A	H76 F77 M172 W189 H199 H200 G203	H67 F68 M163 W180 H190 H191 G194
BS15	CLA	A	G151 I152 Q157 T161 A211 H215 V219 P239	G142 I143 Q148 T152 A202 H206 V210 P230
BS16	CLA	A	G214 I217 H218 W258 G259 F260 G263 Y275 L302	G205 I208 H209 W249 G250 F251 G254 Y266 L293
BS17	CLA	A	H240 L244	H231 L235
BS18	CLA	A	W272 Y275 L279 H299 L302 A303 V306 N504	W263 Y266 L270 H290 L293 A294 V297 N495
BS19	CLA	A	F281 G283 H300 H373 M377 A509	F272 G274 H291 H364 M368 A500
BS20	CLA	A	L205 W212 H300 H301 I304 L366 P379	L196 W203 H291 H292 I295 L357 P370
BS21	CLA	A	H199 A202 H313 T317 W319 I321	H190 A193 H304 T308 W310 I312
BS22	CLA	A	L201 A311 M314 Y315	L192 A302 M305 Y306
BS23	CLA	A	I310 H313 M314 G322 H323	I301 H304 M305 G313 H314
BS24	CLA	A	H323 A331 H332	H314 A322 H323
BS25	CLA	A	L329 H332 H341 L344 V429	L320 H323 H332 L335 V420
BS26	CLA	A	Q191 V193 M196 H200 L348 S351 W352 I358 N359 M363	Q182 V184 M187 H191 L339 S342 W343 I349 N350 M354
BS27	CLA	A	I368 I369 Q372 M398 V405 I546	I359 I360 Q363 M389 V396 I537
BS28	CLA	A	M362 I369 Q372 H373 A376 M377 S510 F513	M353 I360 Q363 H364 A367 M368 S501 F504
BS29	CLA	A	W86 S141 S392 T395 H396 W399 I740 W744	W77 S132 S383 T386 H387 W390 I731 W735
BS30	CLA	A	V370 M374 Y380 L393 H396 H397	V361 M365 Y371 L384 H387 H388
BS31	CLA	A	A53 D57 L356 F403 G407 H411 I414 R418 F574 R575 W592	A44 D48 L347 F394 G398 H402 I405 R409 F565 R566 W583
BS32	CLA	A	F336 V429 R432 V433 H436 H443	F327 V420 R423 V424 H427 H434
BS33	CLA	A	H443 W446	H434 W437
BS34	CLA	A	W446 F450 F453 H454	W437 F441 F444 H445
BS35	CLA	A	F453 H454 H461 M465 R470 D473 F475	F444 H445 H452 M456 R461 D464 F466
BS36	CLA	A	V490 L493 H494 A497 T501	V481 L484 H485 A488 T492
BS37	CLA	A	F281 T501 A502 P503 N504	F272 T492 A493 P494 N495
BS38	CLA	A	Q372 Y375 F486 V490 Q491 I529 H539 H542 H612	Q363 Y366 F477 V481 Q482 I520 H530 H533 H603
BS39	CLA	A	L451 P484 F486 A487 H540	L442 P475 F477 A478 H531
BS40	CLA	A	L444 I546 H547	L435 I537 H538
BS41	CLA	A	H708 V713	H699 V704
BS42	CLA	A	I682 F685 V730 H734	I673 F676 V721 H725
BS43	CLA	A	H332 K333 F336	H323 K324 F327
BS44	PQN	A	M688 F689 W697 A721 L722	M679 F680 W688 A712 L713
BS45	CLA	A	L674 L677 H680 F681 A684	L665 L668 H671 F672 A675
BS46	SF4	A	C578 G580 P581 C587	C569 G571 P572 C578
BS47	CLA	A	L650 W655	L641 W646
BS48	CLA	A	N445 I449 F544 W601	N436 I440 F535 W592
BS49	CLA	A	T45 V713 P715 P719	T36 V704 P706 P710
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:6tra, PDBe:6tra, PDBj:6tra
• PDBsum: 6tra
• UniProt: P0A405|PSAA_THEVB Photosystem I P700 chlorophyll a apoprotein A1 (Gene Name=psaA)