======= LACTB ======= == Gene Information == * **Official Symbol**: LACTB * **Official Name**: lactamase beta * **Aliases and Previous Symbols**: N/A * **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=114294|114294]] * **UniProt**: [[https://www.uniprot.org/uniprot/P83111|P83111]] * **Interactions**: [[https://thebiogrid.org/search.php?search=LACTB&organism=9606|BioGRID]] * **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20LACTB|Open PubMed]] * **OMIM**: [[https://omim.org/entry/608440|Open OMIM]] == Function Summary == * **Entrez Summary**: This gene encodes a mitochondrially-localized protein that has sequence similarity to prokaryotic beta-lactamases. Many of the residues responsible for beta-lactamase activity are not conserved in this protein, suggesting it may have a different enzymatic function. Increased expression of the related mouse gene was found to be associated with obesity. Alternative splicing results in multiple transcript variants encoding different protein isoforms. [provided by RefSeq, Dec 2013]. * **UniProt Summary**: Mitochondrial serine protease that acts as a regulator of mitochondrial lipid metabolism (PubMed:28329758). Acts by decreasing protein levels of PISD, a mitochondrial enzyme that converts phosphatidylserine (PtdSer) to phosphatidylethanolamine (PtdEtn), thereby affecting mitochondrial lipid metabolism (PubMed:28329758). It is unclear whether it acts directly by mediating proteolysis of PISD or by mediating proteolysis of another lipid metabolism protein (PubMed:28329758). Acts as a tumor suppressor that has the ability to inhibit proliferation of multiple types of breast cancer cells: probably by promoting decreased levels of PISD, thereby affecting mitochondrial lipid metabolism (PubMed:28329758). {ECO:0000269|PubMed:28329758}. |Beta-lactamase| |peptidase activity| |regulation of lipid metabolic process| |identical protein binding| |lipid metabolic process| |mitochondrion| |proteolysis| \\ === CRISPR Data === ^Screen^Score^ |[[:results:exp529|Thimerosal 0.85μM R08 exp529]]|1.88| |[[:results:exp465|Cannabidiol 13μM R08 exp465]]|1.89| |[[:results:exp519|RS-1 10μM R08 exp519]]|2.08| 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**: 9949 * **Expression level (log2 read counts)**: 3.56 {{:chemogenomics:nalm6 dist.png?nolink |}}