- Catalog number
- PA2287
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- Suppression of tumorigenicity 5 is a protein that in humans is encoded by the ST5 gene. This gene is mapped to 11p15.4. The protein encoded by this gene contains a C-terminal region that shares similarity with the Rab 3 family of small GTP binding proteins. This protein preferentially binds to the SH3 domain of c-Abl kinase, and acts as a regulator of MAPK1/ERK2 kinase, which may contribute to its ability to reduce the tumorigenic phenotype in cells. Three alternatively spliced transcript variants of this gene encoding distinct isoforms are identified.
- Synonyms
- Suppression of tumorigenicity 5 protein; DENN domain-containing protein 2B; HeLa tumor suppression 1; ST5; DENND2B, HTS1
- Gene Name
- ST5
- Gene ID
- 6764
- UniProt
- P78524
- Host
- Rabbit
- Reactivity
- Human, Mouse, Rat
- Cross Reactivity
- No cross-reactivity with other proteins
- Immunogen
- A synthetic peptide corresponding to a sequence in the middle region of human ST5, different from the related mouse and rat sequences by one amino acid.
- Clonality
- Polyclonal
- Tissue Specificity
- Widely expressed with the exception of peripheral blood lymphocytes. Isoform 1 is expressed in several epithelial and fibroblast (including tumorigenic) but absent in lymphoid cell lines (at protein level) . Isoform 3 is expressed in primary cell or weakly tumorigenic but not in tumorigenic cell lines (at protein level) . .
- Applications
- WB
- Field of Research
- Cancer, MAPK Pathway, Oncoproteins/Suppressors, Protein Phosphorylation, Ser/Thr Kinases, Signal Transduction, Tumor Suppressors
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Guanine nucleotide exchange factor (GEF) which may activate RAB9A and RAB9B. Promotes the exchange of GDP to GTP, converting inactive GDP-bound Rab proteins into their active GTP- bound form. May be involved in cytoskeletal organization and tumorogenicity. Isoform 1 seems to be involved in a signaling transduction pathway leading to activation of MAPK1/ERK2. Isoform 3 may block ERK2 activation stimulated by ABL1. Isoform 3 may alter cell morphology and cell growth. .
- References & Citations
- 1. Entrez Gene: ST5 suppression of tumorigenicity 5 2. Lichy JH, Modi WS, Seuanez HN, Howley PM (Nov 1992) . Identification of a human chromosome 11 gene which is differentially regulated in tumorigenic and nontumorigenic somatic cell hybrids of HeLa cells.Cell Growth Differ 3 (8) : 541–8. 3. Trautmann, U., Vikkula, M., Winterpacht, A., FitzPatrick, D. R., Rauch, A. Disruption of ST5 is associated with mental retardation and multiple congenital abnormalities. J. Med. Genet. 47: 91-98, 2010.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 126485 MW
- Observed Molecular Weight
- 126 kDa
- Specificity
- No cross reactivity with other proteins.
- Gene Name Synonym
- Suppression of tumorigenicity 5 protein
- Sequence Similarities
- Contains 1 dDENN domain.
- Protein Name
- Suppression of tumorigenicity 5 protein
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.