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Protein

Membrane-bound transcription factor site-2 protease

Gene

MBTPS2

Organism
Cricetulus griseus (Chinese hamster) (Cricetulus barabensis griseus)
Status
Reviewed-Annotation score: -Experimental evidence at transcript leveli

Functioni

Intramembrane proteolysis of sterol-regulatory element-binding proteins (SREBPs) within the first transmembrane segment thereby releasing the N-terminal segment with a portion of the transmembrane segment attached. Site-2 cleavage comes after site-1 cleavage which takes place in the lumenal loop.

Catalytic activityi

Cleaves several transcription factors that are type-2 transmembrane proteins within membrane-spanning domains. Known substrates include sterol regulatory element-binding protein (SREBP) -1, SREBP-2 and forms of the transcriptional activator ATF6. SREBP-2 is cleaved at the site 477-DRSRILL-|-CVLTFLCLSFNPLTSLLQWGGA-505. The residues Asn-Pro, 11 residues distal to the site of cleavage in the membrane-spanning domain, are important for cleavage by S2P endopeptidase. Replacement of either of these residues does not prevent cleavage, but there is no cleavage if both of these residues are replaced.

Cofactori

Zn2+By similarityNote: Binds 1 zinc ion per subunit.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi162Zinc; catalyticPROSITE-ProRule annotation1
Active sitei163PROSITE-ProRule annotation1
Metal bindingi166Zinc; catalyticPROSITE-ProRule annotation1

GO - Molecular functioni

GO - Biological processi

  • cholesterol metabolic process Source: UniProtKB-KW
  • membrane protein intracellular domain proteolysis Source: ParkinsonsUK-UCL
  • positive regulation of DNA binding transcription factor activity Source: ParkinsonsUK-UCL
  • positive regulation of transcription from RNA polymerase II promoter in response to endoplasmic reticulum stress Source: ParkinsonsUK-UCL
  • response to endoplasmic reticulum stress Source: ParkinsonsUK-UCL

Keywordsi

Molecular functionHydrolase, Metalloprotease, Protease
Biological processCholesterol metabolism, Lipid metabolism, Steroid metabolism, Sterol metabolism
LigandMetal-binding, Zinc

Enzyme and pathway databases

BRENDAi3.4.24.85 1309

Protein family/group databases

MEROPSiM50.001

Names & Taxonomyi

Protein namesi
Recommended name:
Membrane-bound transcription factor site-2 protease (EC:3.4.24.85)
Alternative name(s):
Endopeptidase S2P
Sterol regulatory element-binding proteins intramembrane protease
Short name:
SREBPs intramembrane protease
Gene namesi
Name:MBTPS2
Synonyms:S2P
OrganismiCricetulus griseus (Chinese hamster) (Cricetulus barabensis griseus)
Taxonomic identifieri10029 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaCricetidaeCricetinaeCricetulus

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 3CytoplasmicBy similarity3
Transmembranei4 – 24HelicalSequence analysisAdd BLAST21
Topological domaini25 – 74LumenalBy similarityAdd BLAST50
Transmembranei75 – 95HelicalSequence analysisAdd BLAST21
Transmembranei96 – 107HelicalSequence analysisAdd BLAST12
Topological domaini108 – 135LumenalBy similarityAdd BLAST28
Transmembranei136 – 160HelicalSequence analysisAdd BLAST25
Transmembranei165 – 177HelicalSequence analysisAdd BLAST13
Transmembranei178 – 200HelicalSequence analysisAdd BLAST23
Transmembranei220 – 242HelicalSequence analysisAdd BLAST23
Topological domaini243 – 437LumenalBy similarityAdd BLAST195
Transmembranei438 – 455HelicalSequence analysisAdd BLAST18
Transmembranei456 – 467HelicalSequence analysisAdd BLAST12
Topological domaini468 – 483LumenalSequence analysisAdd BLAST16
Transmembranei484 – 504HelicalSequence analysisAdd BLAST21
Topological domaini505 – 510CytoplasmicSequence analysis6

Keywords - Cellular componenti

Cytoplasm, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000884811 – 510Membrane-bound transcription factor site-2 proteaseAdd BLAST510

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Glycosylationi328N-linked (GlcNAc...) asparagineSequence analysis1

Keywords - PTMi

Glycoprotein

Proteomic databases

PRIDEiO54862

Structurei

3D structure databases

SMRiO54862
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Compositional biasi109 – 127Poly-SerAdd BLAST19
Compositional biasi276 – 377Cys-richAdd BLAST102
Compositional biasi371 – 375Poly-Ser5

Sequence similaritiesi

Belongs to the peptidase M50A family.Curated

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOVERGENiHBG006397
KOiK07765

Family and domain databases

InterProiView protein in InterPro
IPR001193 MBTPS2
IPR036034 PDZ_sf
IPR008915 Peptidase_M50
PANTHERiPTHR13325 PTHR13325, 1 hit
PfamiView protein in Pfam
PF02163 Peptidase_M50, 1 hit
PRINTSiPR01000 SREBPS2PTASE
SUPFAMiSSF50156 SSF50156, 1 hit
PROSITEiView protein in PROSITE
PS00142 ZINC_PROTEASE, 1 hit

Sequencei

Sequence statusi: Complete.

O54862-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MIPVSLVVVV VGGWTAVYLA DLVLKSSVYF KHSYEDWLEK NGLSISPFHI
60 70 80 90 100
RWQTSVFNRA FYSWGRRKAR MLYQWFNFGM VFGVIAMFSS FFLLGKTLMQ
110 120 130 140 150
TLAQMMADSP SSSSSSSSSS SSSSSSSIHN EQVLQVVVPG INLPVNQLTY
160 170 180 190 200
FFAAVLISGV VHEIGHGIAA IREQVRFNGF GIFLFIIYPG AFVDLFTTHL
210 220 230 240 250
QLISPVQQLR IFCAGIWHNF VLALLGILAL VLLPVILLPF YYTGVGVLIT
260 270 280 290 300
EVAEDSPAIG PRGLFVGDLV THLQDCPVTN VQDWNECLDT IAYEPQIGYC
310 320 330 340 350
ISASTLQQLS FPVRAYKRLD GSTECCNNHS LTDVCFSYRN NFNKRLHTCL
360 370 380 390 400
PARKAVEATQ VCRTNKDCKT SSSSSFCIVP SLETHTRLIK VKHPPQIDML
410 420 430 440 450
YVGHPLHLHY TVSITSFIPR FNFLSIDLPV IVETFVKYLI SLSGALAIVN
460 470 480 490 500
AVPCFALDGQ WILNSFLDAT LTSVIGDNDV KDLIGFFILL GGSVLLAANV
510
TLGLWMVTAR
Length:510
Mass (Da):56,499
Last modified:June 1, 1998 - v1
Checksum:i12B6B2257C0DA7A4
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF019611 mRNA Translation: AAC53526.1
RefSeqiNP_001231018.1, NM_001244089.1

Genome annotation databases

EnsembliENSCGRT00000023705; ENSCGRP00000023384; ENSCGRG00000016934
ENSCGRT00001022434; ENSCGRP00001018190; ENSCGRG00001018020
GeneIDi100689085
KEGGicge:100689085

Similar proteinsi

Entry informationi

Entry nameiMBTP2_CRIGR
AccessioniPrimary (citable) accession number: O54862
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1999
Last sequence update: June 1, 1998
Last modified: May 23, 2018
This is version 82 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

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