======= PRG4 =======
== Gene Information ==
* **Official Symbol**: PRG4
* **Official Name**: proteoglycan 4
* **Aliases and Previous Symbols**: N/A
* **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=10216|10216]]
* **UniProt**: [[https://www.uniprot.org/uniprot/Q92954|Q92954]]
* **Interactions**: [[https://thebiogrid.org/search.php?search=PRG4&organism=9606|BioGRID]]
* **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20PRG4|Open PubMed]]
* **OMIM**: [[https://omim.org/entry/604283|Open OMIM]]
== Function Summary ==
* **Entrez Summary**: The protein encoded by this gene is a large proteoglycan that is synthesized by chondrocytes located at the surface of articular cartilage and by some synovial lining cells. This protein contains both chondroitin sulfate and keratan sulfate glycosaminoglycans. It functions as a boundary lubricant at the cartilage surface and contributes to the elastic absorption and energy dissipation of synovial fluid. Mutations in this gene result in camptodactyly-arthropathy-coxa vara-pericarditis syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014].
* **UniProt Summary**: Plays a role in boundary lubrication within articulating joints. Prevents protein deposition onto cartilage from synovial fluid by controlling adhesion-dependent synovial growth and inhibiting the adhesion of synovial cells to the cartilage surface.
|Somatomedin B|
|Hemopexin|
|extracellular matrix structural constituent conferring compression resistance|
|polysaccharide binding|
|scavenger receptor activity|
|collagen-containing extracellular matrix|
|endocytosis|
|import into cell|
|immune response|
|vesicle-mediated transport|
\\
=== CRISPR Data ===
^Screen^Score^
|[[:results:exp94|Nocodazole 0.1μM R03 exp94]]|-1.79|
|[[:results:exp401|SNS-032 25μM R07 exp401]]|-1.75|
|[[:results:exp480|ETC-159 50μM R08 exp480]]|1.73|
No correlation found to any other genes in chemogenomics.
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**: 4772
* **Expression level (log2 read counts)**: 0.94
{{:chemogenomics:nalm6 dist.png?nolink |}}