======= FAM20B ======= == Gene Information == * **Official Symbol**: FAM20B * **Official Name**: FAM20B glycosaminoglycan xylosylkinase * **Aliases and Previous Symbols**: N/A * **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=9917|9917]] * **UniProt**: [[https://www.uniprot.org/uniprot/O75063|O75063]] * **Interactions**: [[https://thebiogrid.org/search.php?search=FAM20B&organism=9606|BioGRID]] * **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20FAM20B|Open PubMed]] * **OMIM**: [[https://omim.org/entry/611063|Open OMIM]] == Function Summary == * **Entrez Summary**: N/A * **UniProt Summary**: Responsible for the 2-O-phosphorylation of xylose in the glycosaminoglycan-protein linkage region of proteoglycans thereby regulating the amount of mature GAG chains. Sulfated glycosaminoglycans (GAGs), including heparan sulfate and chondroitin sulfate, are synthesized on the so-called common GAG- protein linkage region (GlcUAbeta1-3Galbeta1-3Galbeta1-4Xylbeta1- O-Ser) of core proteins, which is formed by the stepwise addition of monosaccharide residues by the respective specific glycosyltransferases. Xylose 2-O-phosphorylation may influence the catalytic activity of B3GAT3 (GlcAT-I) which completes the precursor tetrasaccharide of GAG-protein linkage regions on which the repeating disaccharide region is synthesized. {ECO:0000269|PubMed:19473117, ECO:0000269|PubMed:24425863}. |DUF1193| |phosphotransferase activity, alcohol group as acceptor| |proteoglycan biosynthetic process| |kinase activity| |proteoglycan metabolic process| |glycoprotein biosynthetic process| |glycoprotein metabolic process| |Golgi membrane| |carbohydrate derivative biosynthetic process| |protein phosphorylation| |Golgi apparatus| |carbohydrate derivative metabolic process| |phosphorylation| |organonitrogen compound biosynthetic process| |ATP binding| |cellular macromolecule biosynthetic process| |macromolecule biosynthetic process| \\ === CRISPR Data === ^Screen^Score^ |[[:results:exp125|GSK461364A 0.005μM R03 exp125]]|1.72| |[[:results:exp37|Wortmannin 0.5μM R00 exp37]]|1.86| |[[:results:exp352|Dexamethasone 0.006 to 0.015μM on day4 R07 exp352]]|2.01| |[[:results:exp240|Pyridostatin 4μM R05 exp240]]|2.39| ^Gene^Correlation^ |[[:human genes:p:papss1|PAPSS1]]|0.447| Global Fraction of Cell Lines Where Essential: 0/739 ^Tissue^Fraction Of Cell Lines Where Essential^ |1290807.0|0/1| |909776.0|0/1| |bile duct|0/28| |blood|0/28| |bone|0/26| |breast|0/33| |central nervous system|0/56| |cervix|0/4| |colorectal|0/17| |esophagus|0/13| |fibroblast|0/1| |gastric|0/16| |kidney|0/21| |liver|0/20| |lung|0/75| |lymphocyte|0/16| |ovary|0/26| |pancreas|0/24| |peripheral nervous system|0/16| |plasma cell|0/15| |prostate|0/1| |skin|0/24| |soft tissue|0/9| |thyroid|0/2| |upper aerodigestive|0/22| |urinary tract|0/29| |uterus|0/5| == Essentiality in NALM6 == * **Essentiality Rank**: 12357 * **Expression level (log2 read counts)**: 6.46 {{:chemogenomics:nalm6 dist.png?nolink |}}