THEM4 (Thioesterase Superfamily Member 4, Acyl-coenzyme A Thioesterase THEM4, Acyl-CoA Thioesterase THEM4, Carboxyl-terminal Modulator Protein, CTMP)

THEM4, also known as CTMP, binds specifically to the carboxy-terminal regulatory domain of PKB/Akt at the plasma membrane and acts as a negative regulator, reversing the phenotype of v-Akt-transformed cells. Hypermethylation of the THEM4 promoter and transcriptional downregulation of the gene has been reported in multiple glioblastomas, suggesting that epigenetic regulation of THEM4 may play a role in the progression of this cancer. Bioinformatic analysis, confirmed by in vitro testing, indicates that THEM4 is a broad-range, high activity acyl-CoA thioesterase. Recent reports have also indicated that TMEM4 is a mitochondrial protein whose overexpression is associated with an increase in mitochondrial membrane depolarization and caspase-3 and PARP cleavage, suggesting that THEM4 is involved in the apoptotic program. The additional higher molecular weight bands seen in the immunoblot may represent post-translationally modified TMEM4.\n\nApplications:\nSuitable for use in ELISA, Western Blot, Immunofluorescence and Immunohistochemistry. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 1-2ug/ml\nImmunohistochemistry (Formalin fixed paraffin embedded): 2.5ug/ml\nImmunofluorescence: 20ug/ml\nOptimal dilutions to be determined by the researcher.\n\nPositive Control:\nHuman Liver Tissue Lysate\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

146463

Size

100ug

Applications

ELISA, IF, IHC, WB

Hosts

Rabbit

Reactivities

Hum, Mouse, Rat

Form

Supplied as a liquid in PBS, 0.02% sodium azide.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

Isotype

IgG

References

1. Maira SM, Galetic I, Brazil DP, et al. Carboxyl-terminal modulator protein (CTMP), a negative regulator of PKB/Akt and v-Akt at the plasma membrane. Science 2001; 294:374-80. 2. Knobbe CB, Reifberger J, Blaschke B, et al. Hypermethylation and transcriptional downregulation of the carboxyl-terminal modulator protein gene in glioblastomas. J. Natl. Cancer Inst. 2004; 96:483-6. 3. Zhao H, Martin BM, Bisoffi M, et al. The Akt C-terminal modulator protein is an acyl-CoA thioesterase of the hotdog-fold family. Biochemistry 2009; 48:5507-9. 4. Parcellier A, Tintignac LA, Zhuravleva E, et al. Carboxy-terminal modulator protein (CTMP) is a mitochondrial protein that sensitizes cells to apoptosis. Cell Signal. 2009; 21:639-50.

Additional Info

Recognizes human THEM4. Species Crossreactivity: mouse and rat.