Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Metalloreductase STEAP4

Gene

Steap4

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Metalloreductase that has the ability to reduce both Fe3+ to Fe2+ and Cu2+ to Cu1+ (PubMed:16609065). Uses NADP+ as acceptor (By similarity). Plays a role in systemic metabolic homeostasis, integrating inflammatory and metabolic responses (PubMed:17482547). Associated with obesity and insulin-resistance (By similarity). Involved in inflammatory arthritis, through the regulation of inflammatory cytokines (PubMed:19660107). Inhibits anchorage-independent cell proliferation (By similarity).By similarity3 Publications

Cofactori

FADBy similarityNote: Can also utilize the flavins FMN and riboflavin.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei67NADPBy similarity1
Binding sitei106NADP; via amide nitrogenBy similarity1
Binding sitei139NADP; via amide nitrogenBy similarity1
Binding sitei171NADPBy similarity1
Metal bindingi304Iron (heme axial ligand)By similarity1
Metal bindingi397Iron (heme axial ligand)By similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi27 – 30NADPBy similarity4
Nucleotide bindingi49 – 50NADPBy similarity2
Nucleotide bindingi81 – 85NADPBy similarity5

GO - Molecular functioni

  • cupric reductase activity Source: MGI
  • ferric-chelate reductase (NADPH) activity Source: MGI
  • metal ion binding Source: UniProtKB-KW

GO - Biological processi

  • copper ion import Source: MGI
  • fat cell differentiation Source: UniProtKB
  • ferric iron import across plasma membrane Source: MGI
  • iron ion homeostasis Source: UniProtKB-KW
  • oxidation-reduction process Source: MGI

Keywordsi

Molecular functionOxidoreductase
Biological processIon transport, Iron transport, Transport
LigandCopper, FAD, Flavoprotein, Heme, Iron, Metal-binding, NAD, NADP

Names & Taxonomyi

Protein namesi
Recommended name:
Metalloreductase STEAP4 (EC:1.16.1.-1 Publication)
Alternative name(s):
Dudulin-4
Six-transmembrane epithelial antigen of prostate 4
Tumor necrosis factor-alpha-induced adipose-related protein
Gene namesi
Name:Steap4
Synonyms:Tiarp
OrganismiMus musculus (Mouse)
Taxonomic identifieri10090 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
Proteomesi
  • UP000000589 Componenti: Chromosome 5

Organism-specific databases

MGIiMGI:1923560. Steap4.

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei196 – 216HelicalSequence analysisAdd BLAST21
Transmembranei247 – 267HelicalSequence analysisAdd BLAST21
Transmembranei293 – 313HelicalSequence analysisAdd BLAST21
Transmembranei348 – 368HelicalSequence analysisAdd BLAST21
Transmembranei386 – 402HelicalSequence analysisAdd BLAST17
Transmembranei419 – 439HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

Cell membrane, Endosome, Golgi apparatus, Membrane

Pathology & Biotechi

Disruption phenotypei

Mice are viable and fertile, but exhibit overt inflammation with increased expression of Il6, Tnfa, Ccl2, haptoglobin and Socs3 in visceral adipose tissue as well as macrophage infiltration. They develop metabolic disease on regular diet with insulin resistance, glucose intolerance, mild hyperglycemia, dyslipidemia, and fatty liver disease. Adipocytes isolated from visceral fat exhibit severily defective glucose transport, with decreased expression of Slc2a4, Adipoq, Fas and Pparg. Glucose disposal is lower in response to insulin stimulation and hepatic glucose production is higher, confirming systemic and hepatic insulin-resistance.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002851751 – 470Metalloreductase STEAP4Add BLAST470

Proteomic databases

MaxQBiQ923B6.
PaxDbiQ923B6.
PRIDEiQ923B6.

PTM databases

iPTMnetiQ923B6.
PhosphoSitePlusiQ923B6.

Expressioni

Tissue specificityi

Expressed in white and brown adipose tissues cells, as well as in muscle and liver cells. Detected in joints and spleens of arthritic mice.2 Publications

Inductioni

By Tnfa (TNF-alpha), by Il6 in white and brown adipose tissue, and IL1B in white adipose tissue. Tnfa, Il6 and Il1b shows sinergistic stimulatory effects.5 Publications

Gene expression databases

BgeeiENSMUSG00000012428.
CleanExiMM_STEAP4.
GenevisibleiQ923B6. MM.

Interactioni

Subunit structurei

Homodimer (By similarity). Interacts with PTK2/FAK1; the interaction may regulate PTK2 phosphorylation (By similarity).By similarity

Protein-protein interaction databases

STRINGi10090.ENSMUSP00000111081.

Structurei

3D structure databases

ProteinModelPortaliQ923B6.
SMRiQ923B6.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini247 – 395Ferric oxidoreductaseSequence analysisAdd BLAST149

Sequence similaritiesi

Belongs to the STEAP family.Curated

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG410IF4F. Eukaryota.
COG2085. LUCA.
GeneTreeiENSGT00390000008042.
HOGENOMiHOG000234491.
HOVERGENiHBG054379.
InParanoidiQ923B6.
KOiK19876.
OMAiYCVIREV.
OrthoDBiEOG091G0F9X.
PhylomeDBiQ923B6.
TreeFamiTF332031.

Family and domain databases

InterProiView protein in InterPro
IPR013130. Fe3_Rdtase_TM_dom.
IPR016040. NAD(P)-bd_dom.
IPR028939. P5C_Rdtase_cat_N.
PfamiView protein in Pfam
PF03807. F420_oxidored. 1 hit.
PF01794. Ferric_reduct. 1 hit.
SUPFAMiSSF51735. SSF51735. 1 hit.

Sequencei

Sequence statusi: Complete.

Q923B6-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEKAHADEFP LTTDSSEKQG VVCIFGTGDF GKSLGLKMLQ CGYSIVFGSR
60 70 80 90 100
NPQVSSLLPR GAEVLSYSEA ASKSDIIILA MHREHYDSLT ELVDYLKGKV
110 120 130 140 150
LVDVSNNRKI NQYPESNAEY LAQLEPGAHV VKAFNTISAW ALQSGTLDAS
160 170 180 190 200
RQVFVCGNDS KAKQRVMDIA RTLGLTPLDQ GSLMAASEIE NYPLQLFPMW
210 220 230 240 250
RFPFYLSSVL CVFFFVYCAI REVIYPYVNG KTDATYRLAI SIPNRVFPIT
260 270 280 290 300
ALILLALVYL PGILAAILQL YRGTKYRRFP NWLDHWMLCR KQLGLVALGF
310 320 330 340 350
AFLHVIYTLV IPIRYYVRWR LRNATITQAL TNKDSPFITS YAWINDSYLA
360 370 380 390 400
LGILGFFLFL LLGITSLPSV SNMVNWREFR FVQSKLGYLT LVLCTAHTLV
410 420 430 440 450
YGGKRFLSPS ILRWSLPSAY ILALVIPCAV LVLKCILIMP CIDKTLTRIR
460 470
QGWERNSKYT QSALNGKSDI
Length:470
Mass (Da):52,994
Last modified:December 1, 2001 - v1
Checksum:i6823E7682AC78B19
GO

Sequence cautioni

The sequence AAK40270 differs from that shown. Reason: Frameshift at positions 334, 336 and 453.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti36L → M in AAK40270 (Ref. 2) Curated1
Sequence conflicti95Y → C in CAC41351 (PubMed:11443137).Curated1
Sequence conflicti108R → H in AAK40270 (Ref. 2) Curated1
Sequence conflicti127G → E in AAK40270 (Ref. 2) Curated1
Sequence conflicti154F → L in AAK40270 (Ref. 2) Curated1
Sequence conflicti164Q → H in CAC41351 (PubMed:11443137).Curated1
Sequence conflicti212V → I in CAC41351 (PubMed:11443137).Curated1
Sequence conflicti212V → I in AAK40270 (Ref. 2) Curated1
Sequence conflicti216V → L in AAK40270 (Ref. 2) Curated1
Sequence conflicti228V → M in AAK40270 (Ref. 2) Curated1
Sequence conflicti305V → A in AAK40270 (Ref. 2) Curated1
Sequence conflicti323N → K in AAK40270 (Ref. 2) Curated1
Sequence conflicti332N → S in AAK40270 (Ref. 2) Curated1
Sequence conflicti362L → V in AAK40270 (Ref. 2) Curated1
Sequence conflicti425V → I in CAC41351 (PubMed:11443137).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ319746 mRNA. Translation: CAC41351.1.
AY029778 mRNA. Translation: AAK40270.1. Frameshift.
AK040760 mRNA. Translation: BAC30696.1.
BC006651 mRNA. Translation: AAH06651.1.
CCDSiCCDS39008.1.
RefSeqiNP_473439.2. NM_054098.3.
UniGeneiMm.31403.

Genome annotation databases

EnsembliENSMUST00000115421; ENSMUSP00000111081; ENSMUSG00000012428.
GeneIDi117167.
KEGGimmu:117167.
UCSCiuc008wjg.1. mouse.

Similar proteinsi

Entry informationi

Entry nameiSTEA4_MOUSE
AccessioniPrimary (citable) accession number: Q923B6
Secondary accession number(s): Q91W31, Q91ZE8
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 1, 2007
Last sequence update: December 1, 2001
Last modified: September 27, 2017
This is version 112 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
  2. SIMILARITY comments
    Index of protein domains and families