Difference between revisions of "Phosphatase Subfamily PTPN1"

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[[Phosphatase classification|Phosphatase Classification]]: [[Phosphatase_Fold_CC1|Fold CC1]]: [[Phosphatase_Superfamily_CC1|Superfamily CC1]]: [[Phosphatase_Family_PTP|Family PTP]]: [[Phosphatase_Subfamily_PTPN1|Subfamily PTPN1]]
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__NOTOC__
  
PTPN1 subfamily dephoshorylate kinases of various families, including Insulin receptor kinase (InsR), epidermal growth factor receptor kinase (EGFR), JAK (JAK2 and TYK2). The phosphatase emerged later than the related kinases. The phosphatase first emerged in Trichoplax. EGFR is conserved from sponge to human but lost in Trichoplax, and InsR is conserved from Trichoplax to human.
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[[Phosphatase classification|Phosphatase Classification]]: [[Phosphatase_Fold_CC1|Fold CC1]]:[[Phosphatase_Superfamily_CC1|Superfamily CC1]]: [[Phosphatase_Family_PTP|Family PTP]]: [[Phosphatase_Subfamily_PTPN1|Subfamily PTPN1]]
  
=== Evolution ===
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The PTPN1 subfamily dephoshorylates kinases of various families, including Insulin receptor kinase (InsR), epidermal growth factor receptor kinase (EGFR), JAK (JAK2 and TYK2).  
PTPN1 subfamily emerged in animals, as it is found in most if not all eumetazoa, Porifera (e.g. sponge) and Placozoa (e.g. Trichoplax), but absent from Choanoflagellata (e.g. Monosiga) (for the phylogeny of animal at [http://en.wikipedia.org/wiki/Animal#Ctenophora.2C_Porifera.2C_Placozoa.2C_Cnidaria_and_Bilateria here]). In human, there are two copies:  [[Phosphatase_Gene_PTPN1|PTPN1 (PTP1B)]] and [[Phosphatase_Gene_PTPN2|PTPN2]]. The two copies can be traced back to the time when vertebrates emerged. The orthologs for each of them are found in most vertebrates from fish to primates, and there is a single copy in non-vertebrate metazoa.
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It substrate EGFR is conserved from sponge to human but lost in Trichoplax, and InsR is conserved from Trichoplax to human.
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===Evolution===
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PTPN1 subfamily emerged in animals, as it is found in most if not all eumetazoa, Porifera (e.g. sponge) and Placozoa (e.g. Trichoplax), but absent from Choanoflagellata (e.g. Monosiga) (for the phylogeny of animal at [http://en.wikipedia.org/wiki/Animal#Ctenophora.2C_Porifera.2C_Placozoa.2C_Cnidaria_and_Bilateria here]). In human, there are two copies:  [[Phosphatase_Gene_PTPN1|PTPN1 (PTP1B)]] and [[Phosphatase_Gene_PTPN2|PTPN2 (TCPTP)]]. The two copies can be traced back to the time when vertebrates emerged. The orthologs for each of them are found in most vertebrates from fish to primates, and there is a single copy in non-vertebrate metazoa.
  
(PS: Why PTPN1 and PTPN2 have different functions?)
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===Domain ===
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The PTPN1 subfamily has a single structural domain, phosphatase domain.
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===Functions===
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The PTPN1 subfamily has various functions <cite>Zabolotny02, Tonks03, Zhang07, Tiganis13</cite>. It dephoshorylates kinases of various families, including Insulin receptor kinase (InsR), epidermal growth factor receptor kinase (EGFR), JAK (JAK2 and TYK2).
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PTPN1 is regulated via glutathionylation of cysteine at the catalytic motif Cx5R <cite>Barrett99</cite>.
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===References===
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<biblio>
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#Barrett99 pmid=10350489
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#Tiganis13 pmid=22404968
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#Tonks03 pmid=12829250
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#Zabolotny02 pmid=11970898
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#Zhang07 pmid=17467573
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</biblio>

Revision as of 23:49, 24 March 2015


Phosphatase Classification: Fold CC1:Superfamily CC1: Family PTP: Subfamily PTPN1

The PTPN1 subfamily dephoshorylates kinases of various families, including Insulin receptor kinase (InsR), epidermal growth factor receptor kinase (EGFR), JAK (JAK2 and TYK2).

Evolution

PTPN1 subfamily emerged in animals, as it is found in most if not all eumetazoa, Porifera (e.g. sponge) and Placozoa (e.g. Trichoplax), but absent from Choanoflagellata (e.g. Monosiga) (for the phylogeny of animal at here). In human, there are two copies: PTPN1 (PTP1B) and PTPN2 (TCPTP). The two copies can be traced back to the time when vertebrates emerged. The orthologs for each of them are found in most vertebrates from fish to primates, and there is a single copy in non-vertebrate metazoa.

Domain

The PTPN1 subfamily has a single structural domain, phosphatase domain.

Functions

The PTPN1 subfamily has various functions [1, 2, 3, 4]. It dephoshorylates kinases of various families, including Insulin receptor kinase (InsR), epidermal growth factor receptor kinase (EGFR), JAK (JAK2 and TYK2).

PTPN1 is regulated via glutathionylation of cysteine at the catalytic motif Cx5R [5].

References

Error fetching PMID 10350489:
Error fetching PMID 22404968:
Error fetching PMID 12829250:
Error fetching PMID 11970898:
Error fetching PMID 17467573:
  1. Error fetching PMID 11970898: [Zabolotny02]
  2. Error fetching PMID 12829250: [Tonks03]
  3. Error fetching PMID 17467573: [Zhang07]
  4. Error fetching PMID 22404968: [Tiganis13]
  5. Error fetching PMID 10350489: [Barrett99]
All Medline abstracts: PubMed | HubMed