Structure of PDB 5h8v Chain B

Receptor sequence

>5h8vB (length=560) Species: 4577 (Zea mays) [Search protein sequence]

KRSKVEIIKEKSNFLRYPLNEELVSEAPNINESAVQLIKFHGSYQQTDRD
VRGQKNYSFMLRTKNPCGKVPNQLYLAMDTLADEFGIGTLRLTTRQTFQL
HGVLKKNLKTVLSTVIKNMGSTLGACGDLNRNVLAPAAPYVKKDILFAQQ
TAENIAALLTPQSGAYYDLWVDGEEPPEVTKARNDNSHGTNFPDSPEPIY
GTQYLPRKFKVAVTAAGDNSVDILTNDIGVVVVSDDAGEPIGFNIYVGGG
MGRTHRVETTFPRLADPLGYVPKEDILYAIKAIVVTQRENGRRDDRKYSR
MKYMIDRWGIDRFRAEVEKYYGKKFESFRPLPEWQFNSYLGWQEQGDGKL
FYGVHVDNGRVGGQAKKTLREIIEKYNLDVSITPNQNLILCGIDQAWREP
ITTALAQAGLLEPKDVDPLNLTAMACPALPLCPLAQTEAERGILPILKRI
RAVFNKVGIKDSESVVVRITGCPNGCARPYMAELGFVGDGPKSYQIWLGG
TPNQSTLAESFMDKVKLDDIEKVLEPLFTYWNGTRQEGESFGSFTNRTGF
DKLKEVVNKW

3D structure

PDB

5h8v 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 K208 K210 P384 C426 C432 C472 C476
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 T538 G539 C540 N542 C544	C426 A428 C432 A435 T470 G471 C472 N474 C476
BS02	SRM	B	Y106 Q108 R124 R153 T155 T156 R157 T159 Q161 H163 R275 K276 K278 G318 M319 G320 R368 Q454 P495 C500 P501 N542 C544 R546	Y44 Q46 R62 R91 T93 T94 R95 T97 Q99 H101 R207 K208 K210 G250 M251 G252 R300 Q386 P427 C432 P433 N474 C476 R478
BS03	MG	B	V424 N453 N455	V356 N385 N387

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

View graph for
Molecular Function

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Biological Process

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Cellular Component

External links

PDB	RCSB:5h8v, PDBe:5h8v, PDBj:5h8v
PDBsum	5h8v
PubMed	26920048
UniProt	O23813\|SIR_MAIZE Sulfite reductase [ferredoxin], chloroplastic (Gene Name=SIR)

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