Structure of PDB 6qwg Chain A

Receptor sequence

>6qwgA (length=333) Species: 223 (Achromobacter cycloclastes)

DISTLPRVKVDLVKPPFVHAHDQVAKTGPRVVEFTMTIEEKKLVIDREGT
EIHAMTFNGSVPGPLMVVHENDYVELRLINPDTNTLLHNIDFHAATGALG
GGALTQVNPGEETTLRFKATKPGVFVYHCAPEGMVPWHVTSGMNGAIMVL
PRDGLKDEKGQPLTYDKIYYVGEQDFYVPKDEAGNYKKYETPGEAYEDAV
KAMRTLTPTHIVFNGAVGALTGDHALTAAVGERVLVVHSQANRDTRPHLI
GGHGDYVWATGKFRNPPDLDQETWLIPGGTAGAAFYTFRQPGVYAYVNHN
LIEAFELGAAGHFKVTGEWNDDLMTSVVKPASM

3D structure

• PDB: 6qwg High-throughput structures of protein-ligand complexes at room temperature using serial femtosecond crystallography.
• Chain: A
• Resolution: 1.9 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): H95 D98 H100 H135 C136 H145 M150 H255 E279 T280 H306
• Catalytic site (residue number reindexed from 1): H88 D91 H93 H128 C129 H138 M143 H248 E272 T273 H299
• Enzyme Commision number: 1.7.2.1: nitrite reductase (NO-forming).

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	NO2	A	H255 I257 H306	H248 I250 H299
BS02	CU	A	H95 C136 H145 M150	H88 C129 H138 M143
BS03	CU	A	H100 H135	H93 H128

Gene Ontology

Molecular Function

• GO:0005507 copper ion binding
• GO:0016491 oxidoreductase activity
• GO:0046872 metal ion binding
• GO:0050421 nitrite reductase (NO-forming) activity

Biological Process

• GO:0019333 denitrification pathway
• GO:0042128 nitrate assimilation

Cellular Component

• GO:0042597 periplasmic space

External links

• PDB: RCSB:6qwg, PDBe:6qwg, PDBj:6qwg
• PDBsum: 6qwg
• PubMed: 31709063
• UniProt: P25006|NIR_ACHCY Copper-containing nitrite reductase (Gene Name=nirK)