UniProt:P18031 PTPN1

chain
  • chain:1-435
checksum 802377DCD33F41FD
comment
  • FUNCTION Tyrosine-protein phosphatase which acts as a regulator of endoplasmic reticulum unfolded protein response. Mediates dephosphorylation of EIF2AK3/PERK; inactivating the protein kinase activity of EIF2AK3/PERK. May play an important role in CKII- and p60c-src-induced signal transduction cascades. May regulate the EFNA5-EPHA3 signaling pathway which modulates cell reorganization and cell-cell repulsion. May also regulate the hepatocyte growth factor receptor signaling pathway through dephosphorylation of MET.CATALYTIC ACTIVITY O-phospho-L-tyrosyl-[protein] + H2O = L-tyrosyl-[protein] + phosphateSUBUNIT Interacts with EPHA3 (phosphorylated); dephosphorylates EPHA3 and may regulate its trafficking and function (PubMed:21135139). Interacts with MET (PubMed:18819921). Interacts with NCK1 (PubMed:21707536).INTERACTION Interacts with EPHA3 at the cell membrane.TISSUE SPECIFICITY Expressed in keratinocytes (at protein level).PTM Oxidized on Cys-215; the Cys-SOH formed in response to redox signaling reacts with the alpha-amido of the following residue to form a sulfenamide cross-link, triggering a conformational change that inhibits substrate binding and activity. The active site can be restored by reduction.PTM Ser-50 is the major site of phosphorylation as compared to Ser-242 and Ser-243. Activated by phosphorylation at Ser-50.PTM S-nitrosylation of Cys-215 inactivates the enzyme activity.PTM Sulfhydration at Cys-215 following endoplasmic reticulum stress inactivates the enzyme activity, promoting EIF2AK3/PERK activity.SIMILARITY Belongs to the protein-tyrosine phosphatase family. Non-receptor class 1 subfamily.
crossReference
databaseName UniProt
dbId 62423
description
  • recommendedName: Tyrosine-protein phosphatase non-receptor type 1 ecNumber: 3.1.3.48 alternativeName: Protein-tyrosine phosphatase 1B shortName: PTP-1B
displayName UniProt:P18031 PTPN1
geneName
  • PTPN1
  • PTP1B
identifier P18031
isSequenceChanged false
keyword
  • 3D-structure
  • Acetylation
  • Direct protein sequencing
  • Endoplasmic reticulum
  • Hydrolase
  • Membrane
  • Oxidation
  • Phosphoprotein
  • Protein phosphatase
  • Proteomics identification
  • Reference proteome
  • S-nitrosylation
modified [InstanceEdit:9939033] Weiser, Joel, 2025-02-21
moleculeType Protein
name
  • PTPN1
otherIdentifier
  • 11717146_at
  • 11717147_a_at
  • 16914844
  • 16914859
  • 202716_PM_at
  • 202716_at
  • 3888722
  • 3888723
  • 3888724
  • 3888725
  • 3888747
  • 3888751
  • 3888753
  • 3888755
  • 3888761
  • 3888762
  • 3888764
  • 3888766
  • 3888767
  • 3888769
  • 3888770
  • 3888772
  • 3888773
  • 3888774
  • 3888775
  • 3888776
  • 3888777
  • 3888778
  • 3888783
  • 3888785
  • 40137_at
  • 5770
  • 588_at
  • 591_s_at
  • 8063394
  • A_14_P115470
  • A_23_P338890
  • GE57927
  • GO:0003084
  • GO:0003723
  • GO:0003824
  • GO:0004721
  • GO:0004725
  • GO:0004726
  • GO:0005158
  • GO:0005515
  • GO:0005737
  • GO:0005759
  • GO:0005768
  • GO:0005769
  • GO:0005783
  • GO:0005789
  • GO:0005829
  • GO:0005886
  • GO:0006470
  • GO:0008270
  • GO:0008285
  • GO:0008286
  • GO:0009966
  • GO:0009968
  • GO:0010460
  • GO:0010666
  • GO:0010812
  • GO:0010977
  • GO:0012505
  • GO:0016020
  • GO:0016311
  • GO:0016787
  • GO:0016791
  • GO:0019899
  • GO:0019901
  • GO:0030036
  • GO:0030061
  • GO:0030100
  • GO:0030162
  • GO:0030948
  • GO:0030968
  • GO:0030971
  • GO:0031667
  • GO:0031904
  • GO:0032869
  • GO:0032991
  • GO:0033157
  • GO:0034620
  • GO:0034976
  • GO:0035335
  • GO:0035791
  • GO:0036120
  • GO:0036498
  • GO:0038020
  • GO:0043407
  • GO:0044344
  • GO:0045296
  • GO:0046330
  • GO:0046626
  • GO:0046627
  • GO:0046875
  • GO:0051721
  • GO:0051898
  • GO:0060338
  • GO:0060397
  • GO:0070373
  • GO:0071456
  • GO:0071732
  • GO:0097443
  • GO:0097706
  • GO:0098554
  • GO:0098794
  • GO:0098978
  • GO:0140096
  • GO:0150052
  • GO:1902202
  • GO:1902236
  • GO:1903896
  • GO:1903898
  • GO:1904385
  • GO:1904753
  • GO:1990090
  • GO:1990776
  • GO:2000353
  • GO:2000646
  • HMNXSV003018706
  • ILMN_1681591
  • M31724_at
  • M33684_s_at
  • PH_hs_0025079
  • TC20000403.hg
  • TC20000405.hg
  • g4506288_3p_at
physicalEntity
referenceDatabase [ReferenceDatabase:2] UniProt
referenceGene
referenceTranscript
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • PTN1_HUMAN
  • Q5TGD8
  • Q9BQV9
  • Q9NQQ4
sequenceLength 435
species [Species:48887] Homo sapiens
stId uniprot:P18031
url http://purl.uniprot.org/uniprot/P18031

Referrals

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