Abstract
Some EGF(epidermal growth factor)-type domains in extracellular proteins have conserved ASP/ASN residues that are substrates of an endoplasmic reticulum membrane-bound enzyme aspartyl/asparaginyl beta-hydroxylase (EC:1.14.11.16). The ASX residues are hydroxylated by the enzyme, forming the beta hydroxylated residue. Many blood coagulation factors, the LDL receptor, BMP 1, Thrombomodulin, EGF have the modification. Drosophila proteins involved in development include crumbs, delta, notch, serrate, slit and tolloid. May be restricted to metazoans. The Prosite entry PS00010 lists many modified proteins.
Selected references
This ELM has been assigned the following Gene Ontology (GO) terms for biological process, cellular component and molecular function.
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Biological Process |
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cell differentiation
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development
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Cellular Component |
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endoplasmic reticulum |
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extracellular |
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Molecular Function |
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