Structure of PDB 5h8y Chain B

Receptor sequence

>5h8yB (length=565) Species: 4577 (Zea mays) [Search protein sequence]

KRSKVEIIKEKSNFLRYPLNEELVSEAPNINESAVQLIKFHGSYQQTDRD
VRGQKNYSFMLRTKNPCGKVPNQLYLAMDTLADEFGIGTLRLTTRQTFQL
HGVLKKNLKTVLSTVIKNMGSTLGACGDLNRNVLAPAAPYVKKDILFAQQ
TAENIAALLTPQSGAYYDLWVDEKIMSAEEPPEVTKARNDNSHGTNFPDS
PEPIYGTQYLPRKFKVAVTAAGDNSVDILTNDIGVVVVSDDAGEPIGFNI
YVGGGMGRTHRVETTFPRLADPLGYVPKEDILYAIKAIVVTQRENGRRDD
RKYSRMKYMIDRWGIDRFRAEVEKYYGKKFESFRPLPEWQFNSYLGWQEQ
GDGKLFYGVHVDNGRVGGQAKKTLREIIEKYNLDVSITPNQNLILCGIDQ
AWREPITTALAQAGLLEPKDVDPLNLTAMACPALPLCPLAQTEAERGILP
ILKRIRAVFNKVGIKDSESVVVRITGCPNGCARPYMAELGFVGDGPKSYQ
IWLGGTPNQSTLAESFMDKVKLDDIEKVLEPLFTYWNGTRQEGESFGSFT
NRTGFDKLKEVVNKW

3D structure

PDB

5h8y Structural and mutational studies of an electron transfer complex of maize sulfite reductase and ferredoxin.

Chain

Resolution

2.2 Å

3D
structure

Catalytic site residues are labeled in the structure
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Enzymatic activity

Catalytic site (original residue number in PDB)	R124 R193 K276 K278 P452 C494 C500 C540 C544
Catalytic site (residue number reindexed from 1)	R62 R131 K213 K215 P389 C431 C437 C477 C481
Enzyme Commision number	1.8.7.1: assimilatory sulfite reductase (ferredoxin).

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	SF4	B	C494 A496 C500 A503 G539 C540 N542 C544	C431 A433 C437 A440 G476 C477 N479 C481
BS02	SRM	B	Y106 Q108 R124 R153 T155 T156 R157 T159 Q161 H163 R275 K276 K278 G318 M319 G320 R368 Q454 P495 C500 L502 N542 G543 C544 R546	Y44 Q46 R62 R91 T93 T94 R95 T97 Q99 H101 R212 K213 K215 G255 M256 G257 R305 Q391 P432 C437 L439 N479 G480 C481 R483
BS03	MG	B	V424 N453 N455	V361 N390 N392

Gene Ontology

	Molecular Function
GO:0003677	DNA binding
GO:0003690	double-stranded DNA binding
GO:0016002	sulfite reductase activity
GO:0016491	oxidoreductase activity
GO:0020037	heme binding
GO:0046872	metal ion binding
GO:0050311	sulfite reductase (ferredoxin) activity
GO:0051536	iron-sulfur cluster binding
GO:0051539	4 iron, 4 sulfur cluster binding

	Biological Process
GO:0000103	sulfate assimilation
GO:0006790	sulfur compound metabolic process
GO:0009409	response to cold
GO:0019418	sulfide oxidation
GO:0045892	negative regulation of DNA-templated transcription
GO:1900160	plastid chromosome packaging

	Cellular Component
GO:0009337	sulfite reductase complex (NADPH)
GO:0009507	chloroplast
GO:0009570	chloroplast stroma
GO:0010319	stromule
GO:0042644	chloroplast nucleoid

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Molecular Function

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Biological Process

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Cellular Component

External links

PDB	RCSB:5h8y, PDBe:5h8y, PDBj:5h8y
PDBsum	5h8y
PubMed	26920048
UniProt	O23813\|SIR_MAIZE Sulfite reductase [ferredoxin], chloroplastic (Gene Name=SIR)

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