Structure of PDB 6qkr Chain B

Receptor sequence

>6qkrB (length=664) Species: 700510 (bacterium enrichment culture clone N47)

MYENLCKPIKIGNHLVKNRMKYAATVDNFCDTKNGNVIDREIEYLRERAK
GGFGIVVSQGGYTHILGKGYVGQMGLVEESHLPGLKKLADAINAEGAMSI
GQIMHTGRYGHAHEYGIHEAIAGGKTVGPEPVGPTAMSSPIKRYSPCREM
TPEEIEEQIQAHIVAARMFKQTGWKGVEVCAIVGYLIADFLSRWTNKRTD
KWGGSLENRARFLIEILKGIRKEVGDDYPLVMRLNSTDLIEGGNTDEEYI
EIAKMCEAAVRIDLFSITVGWHESPGAAITAEKRPGDWLHLADNWKKAGI
KAPICMAYRMNQPDVAEKAVAEGRIDIWEMCRPGIADPYLPKKVCEGRPE
DIVTCTACNQGCFYYVFIDAIMGCMVNPRVGNEWDPAYAINPAAKKKKVL
VVGAGPSGMECARLAAVRGHDVTIMEKSDSIGGEVKLGVKSPLLYDWAET
IRYYKAQIDKLGIKLKLNTEATADSIKAEAPDVLVIATGGKPSRPKIEGI
DNKIVTNVFDILEGKVKLGDKVVFIGGNEISIQTAEYVAEQGKEVTVLEK
GKHICFDVNIFNILQHRRLMAKLNMKSMTNVTINEINDDGVEISTAGGKD
VTIEADNVVVAEGMDADDALAKAVGTKIAPEVYSIGDCAGVRKLYEAIHD
GYKMGVKIRGSLEV

3D structure

• PDB: 6qkr Low potential enzymatic hydride transfer via highly cooperative and inversely functionalized flavin cofactors.
• Chain: B
• Resolution: 2.2 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): V38 C192 V195 Y197 R245 E253 H284 Q372
• Catalytic site (residue number reindexed from 1): V26 C180 V183 Y185 R233 E241 H272 Q360

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	SF4	B	R344 I347 C367 T368 A369 C370 N371 G373 C374 C386 M387	R332 I335 C355 T356 A357 C358 N359 G361 C362 C374 M375
BS02	FAD	B	V414 G415 G417 P418 S419 M437 E438 K439 G445 E446 W459 E482 A483 A499 T500 G501 E541 I542 Q545 G648 D649 K655 L656 A659	V402 G403 G405 P406 S407 M425 E426 K427 G433 E434 W447 E470 A471 A487 T488 G489 E529 I530 Q533 G636 D637 K643 L644 A647
BS03	FMN	B	A36 T37 V38 Q114 M116 R245 Y320 R321 M342 C343 R344 F375	A24 T25 V26 Q102 M104 R233 Y308 R309 M330 C331 R332 F363
BS04	J5H	B	V38 Y82 I153 K154 R155 V195 Y197 W283 H284 S286 Y320 F375 F379 I572 F573 L576 R579	V26 Y70 I141 K142 R143 V183 Y185 W271 H272 S274 Y308 F363 F367 I560 F561 L564 R567

Gene Ontology

Molecular Function

• GO:0000166 nucleotide binding
• GO:0010181 FMN binding
• GO:0016491 oxidoreductase activity
• GO:0046872 metal ion binding
• GO:0051539 4 iron, 4 sulfur cluster binding

Biological Process

• GO:0009056 catabolic process

External links

• PDB: RCSB:6qkr, PDBe:6qkr, PDBj:6qkr
• PDBsum: 6qkr
• PubMed: 31061390
• UniProt: E1YD54