Difference between revisions of "Phosphatase Superfamily AP"
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[[Phosphatase classification|Phosphatase Classification]]: [[Phosphatase_Superfamily_Alkaline_Phosphatase|Alkaline phosphatase superfamily]] | [[Phosphatase classification|Phosphatase Classification]]: [[Phosphatase_Superfamily_Alkaline_Phosphatase|Alkaline phosphatase superfamily]] | ||
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===Alkaline phosphatase superfamily=== | ===Alkaline phosphatase superfamily=== | ||
Alkaline phosphatases are a superfamily ([http://pfam.xfam.org/family/PF00245 Pfam]) with a wide variety of substrates, possibly including phosphoproteins. There are four human alkaline phosphatases, named by their tissue expression: [http://www.ncbi.nlm.nih.gov/gene/248 ALPI] (alkaline phosphatase, intestinal), [http://www.ncbi.nlm.nih.gov/gene/250 ALPP] (alkaline phosphatase, placental), [http://www.ncbi.nlm.nih.gov/gene/251 ALPPL2] (alkaline phosphatase, placental-like 2), and [http://www.ncbi.nlm.nih.gov/gene/249 ALPL] (alkaline phosphatase, liver/bone/kidneytissue). Early reports found that ALPL and ALPI can dephosphorylate Histone H2A <cite>Swarup, Chan</cite> and that PLAP is a protein tyrosine phosphatase <cite>Telfer</cite>, but their physiological relevance as protein phosphatases is still unclear. | Alkaline phosphatases are a superfamily ([http://pfam.xfam.org/family/PF00245 Pfam]) with a wide variety of substrates, possibly including phosphoproteins. There are four human alkaline phosphatases, named by their tissue expression: [http://www.ncbi.nlm.nih.gov/gene/248 ALPI] (alkaline phosphatase, intestinal), [http://www.ncbi.nlm.nih.gov/gene/250 ALPP] (alkaline phosphatase, placental), [http://www.ncbi.nlm.nih.gov/gene/251 ALPPL2] (alkaline phosphatase, placental-like 2), and [http://www.ncbi.nlm.nih.gov/gene/249 ALPL] (alkaline phosphatase, liver/bone/kidneytissue). Early reports found that ALPL and ALPI can dephosphorylate Histone H2A <cite>Swarup, Chan</cite> and that PLAP is a protein tyrosine phosphatase <cite>Telfer</cite>, but their physiological relevance as protein phosphatases is still unclear. | ||
| − | Alkaline phosphatases are found in metazoa, fungi | + | Alkaline phosphatases are found in metazoa, fungi, some protists, and bacteria, but are absent from most plants. They belong to the alkaline phosphatase-like fold ([http://scop.mrc-lmb.cam.ac.uk/scop/data/scop.b.d.bah.A.html SCOP]), which contains other enzymes, such as phosphoesterases and sulfatases. |
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===References=== | ===References=== | ||
Revision as of 19:04, 30 December 2014
Phosphatase Classification: Alkaline phosphatase superfamily
Alkaline phosphatase superfamily
Alkaline phosphatases are a superfamily (Pfam) with a wide variety of substrates, possibly including phosphoproteins. There are four human alkaline phosphatases, named by their tissue expression: ALPI (alkaline phosphatase, intestinal), ALPP (alkaline phosphatase, placental), ALPPL2 (alkaline phosphatase, placental-like 2), and ALPL (alkaline phosphatase, liver/bone/kidneytissue). Early reports found that ALPL and ALPI can dephosphorylate Histone H2A [1, 2] and that PLAP is a protein tyrosine phosphatase [3], but their physiological relevance as protein phosphatases is still unclear.
Alkaline phosphatases are found in metazoa, fungi, some protists, and bacteria, but are absent from most plants. They belong to the alkaline phosphatase-like fold (SCOP), which contains other enzymes, such as phosphoesterases and sulfatases.
References
- Swarup G, Cohen S, and Garbers DL. Selective dephosphorylation of proteins containing phosphotyrosine by alkaline phosphatases. J Biol Chem. 1981 Aug 10;256(15):8197-201.
- Chan JR and Stinson RA. Dephosphorylation of phosphoproteins of human liver plasma membranes by endogenous and purified liver alkaline phosphatases. J Biol Chem. 1986 Jun 15;261(17):7635-9.
- Telfer JF and Green CD. Placental alkaline phosphatase activity is inversely related to cell growth rate in HeLaS3 cervical cancer cells. FEBS Lett. 1993 Aug 30;329(3):238-44. DOI:10.1016/0014-5793(93)80229-n |
