======= 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 |}}