Structure of PDB 2j7a Chain N

Receptor sequence

>2j7aN (length=498) Species: 882 (Nitratidesulfovibrio vulgaris str. Hildenborough)

AGCSDVSTELKTPVYKTKLTAEEIRNSAFKPEFPKQYASYERNDETTVMT
EYKGSVPFNKNDNVNPLPEGYRHAQPYLKNLWLGYPFMYEYREARGHTYA
IQDFLHIDRINRYAEKGGLPATCWNCKTPKMMEWVKESGDGFWAKDVNEF
RDKIDMKDHTIGCATCHDPQTMELRITSVPLTDYLVSQGKDPKKLPRNEM
RALVCGQCHVEYYFNGPTMGVNKKPVFPWAEGFDPADMYRYYDKHGDLQV
KGFEGKFADWTHPASKTPMIKAQHPEYETWINGTHGAAGVTCADCHMSYT
RSDDKKKISSHWWTSPMKDPEMRACRQCHSDKTPDYLKSRVLFTQKRTFD
LLLAAQEVSVKAHEAVRLANEYQGAKAAGYDDLMIQAREMVRKGQFFWDY
VSAENSVGFHNPAKALDTLAQSQQFSQKAIDLAMEATQYGIGKDLSGDIK
TIVPPILKMNRKLQQDPEFMKTHKWFQYLPVLPKADQVWDGQKRLVSA

3D structure

• PDB: 2j7a X-Ray Structure of the Membrane-Bound Cytochrome C Quinol Dehydrogenase Nrfh Reveals Novel Haem Coordination.
• Chain: N
• Resolution: 2.3 Å

Enzymatic activity

• Enzyme Commision number: 1.7.2.2: nitrite reductase (cytochrome; ammonia-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	HEC	N	H353 K356	H329 K332
BS02	HEC	N	R116 A118 F128 I131 R133 C147 C150 K151 C232 H233 Y236 H298 N429	R92 A94 F104 I107 R109 C123 C126 K127 C208 H209 Y212 H274 N405
BS03	HEC	N	Y39 F57 Q60 Y64 G186 C187 C190 H191 M196 L198 R221 R225 M321 I332 S333 H335 W337	Y15 F33 Q36 Y40 G162 C163 C166 H167 M172 L174 R197 R201 M297 I308 S309 H311 W313
BS04	HEC	N	S79 A118 R119 H121 Y123 A124 D127 C150 K151 I185 T189 C229 C232 H233 H320 W337 T338	S55 A94 R95 H97 Y99 A100 D103 C126 K127 I161 T165 C205 C208 H209 H296 W313 T314
BS05	HEC	N	T74 K77 H233 W304 H309 T315 C316 C319 H320 S339 P340 M341 Q369 N429 F433 H434	T50 K53 H209 W280 H285 T291 C292 C295 H296 S315 P316 M317 Q345 N405 F409 H410
BS06	HEC	N	H309 V314 C349 C352 H353 F433	H285 V290 C325 C328 H329 F409
BS07	CA	N	E235 Y236 K295 Q297	E211 Y212 K271 Q273
BS08	CA	N	G78 E117 A118	G54 E93 A94

Gene Ontology

Molecular Function

• GO:0016491 oxidoreductase activity
• GO:0020037 heme binding
• GO:0042279 nitrite reductase (cytochrome, ammonia-forming) activity
• GO:0046872 metal ion binding

Biological Process

• GO:0019645 anaerobic electron transport chain

Cellular Component

• GO:0005886 plasma membrane
• GO:0030288 outer membrane-bounded periplasmic space
• GO:0042597 periplasmic space

External links

• PDB: RCSB:2j7a, PDBe:2j7a, PDBj:2j7a
• PDBsum: 2j7a
• PubMed: 17139260
• UniProt: Q72EF3|NRFA_NITV2 Cytochrome c nitrite reductase subunit NrfA (Gene Name=nrfA)