Structure of PDB 3rkh Chain B

Receptor sequence

>3rkhB (length=520) Species: 186931 (Thioalkalivibrio nitratireducens) [Search protein sequence]

NLKPVDAMQCFDCHTQIEDMHTVGKHATVNCVHCHDATEHVETASSRRMG
ERPVTRMDLEACATCHTAQFNSFVEVRHESHPRLEKATPTSRSPMFDKLI
AGHGFAFEHAEPRSHAFMLVDHFVVDRAYGGRFQFKNWQKVTDGMGAVRG
AWTVLTDADPESSDQRRFLSQTATAANPVCLNCKTQDHILDWAYMGDEHE
AAKWSRTSEVVEFARDLNHPLNCFMCHDPHSAGPRVVRDGLINAVVDRGL
GTYPHDPVKSEQQGMTKVTFQRGREDFRAIGLLDTADSNVMCAQCHVEYN
CNPGYQLSDGSRVGMDDRRANHFFWANVFDYKEAAQEIDFFDFRHATTGA
ALPKLQHPEAETFWGSVHERNGVACADCHMPKVQLENGKVYTSHSQRTPR
DMMGQACLNCHAEWTEDQALYAIDYIKNYTHGKIVKSEYWLAKMIDLFPV
AKRAGVSEDVLNQARELHYDAHLYWEWWTAENSVGFHNPDQARESLMTSI
SKSKEAVSLLNDAIDAQVAV

3D structure

PDB

3rkh Covalent modifications of the catalytic tyrosine in octahaem cytochrome c nitrite reductase and their effect on the enzyme activity.

Chain

Resolution

1.83 Å

3D
structure

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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)
BS01	HEC	B	H113 A114 D125 H126 V129 R131 C184 C187 K188 C299 H300 Y303 C305 F327 H361 N486	H109 A110 D121 H122 V125 R127 C180 C183 K184 C295 H296 Y299 C301 F323 H357 N482
BS02	HEC	B	H70 Q73 L225 C227 C230 H231 A290 M295 M384 Y395 T396 H398	H66 Q69 L221 C223 C226 H227 A286 M291 M380 Y391 T392 H394
BS03	HEC	B	S84 P116 R117 H119 F121 M122 D125 C187 L225 M229 C296 C299 H300 Q400 R401	S80 P112 R113 H115 F117 M118 D121 C183 L221 M225 C292 C295 H296 Q396 R397
BS04	HEC	B	H300 E363 F367 H372 A378 C379 C382 H383 T402 P403 R404 I427 K431 N486 S487 F490 H491	H296 E359 F363 H368 A374 C375 C378 H379 T398 P399 R400 I423 K427 N482 S483 F486 H487
BS05	HEC	B	V371 H372 P403 A410 C411 C414 H415 W418 I427 F490	V367 H368 P399 A406 C407 C410 H411 W414 I423 F486
BS06	HEC	B	C14 F15 H18 I21 H25 C35 C38 H39 T59 I193 L194 F228 P233 H234 R239 F274 R276 R282	C10 F11 H14 I17 H21 C31 C34 H35 T55 I189 L190 F224 P229 H230 R235 F270 R272 R278
BS07	HEC	B	K29 H30 V33 H37 C66 C69 H70 H231 A236	K25 H26 V29 H33 C62 C65 H66 H227 A232
BS08	HEC	B	C14 C17 H18 H39 A41 H44 V45 A48 S49 S50 R51 R52 M53 R56 P57 L194 Q275 R276	C10 C13 H14 H35 A37 H40 V41 A44 S45 S46 R47 R48 M49 R52 P53 L190 Q271 R272
BS09	NO2	B	Y303 H361	Y299 H357
BS10	CA	B	E302 Y303 K358 Q360	E298 Y299 K354 Q356

Gene Ontology

	Molecular Function
GO:0005509	calcium ion binding
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
GO:0042128	nitrate assimilation
GO:0097164	ammonium ion metabolic process

	Cellular Component
GO:0030288	outer membrane-bounded periplasmic space
GO:0042597	periplasmic space

View graph for
Molecular Function

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Biological Process

View graph for
Cellular Component

External links

PDB	RCSB:3rkh, PDBe:3rkh, PDBj:3rkh
PDBsum	3rkh
PubMed	22281743
UniProt	L0DSL2\|NIR_THIND Cytochrome c-552 (Gene Name=nir)

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