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Most cancer tissues showed weak to moderate cytoplasmic immunoreactivity. Strong staining was observed in a few gliomas, thyroid cancers and colorectal cancers.
Cancer tissues showed moderate to strong cytoplasmic positivity. Several cases of gliomas were negative.
GENE INFORMATION
Gene name
CHM (HGNC Symbol)
Synonyms
DXS540, REP-1, TCD
Description
Choroideremia (Rab escort protein 1) (HGNC Symbol)
Entrez gene summary
This gene encodes component A of the RAB geranylgeranyl transferase holoenzyme. In the dimeric holoenzyme, this subunit binds unprenylated Rab GTPases and then presents them to the catalytic Rab GGTase subunit for the geranylgeranyl transfer reaction. Rab GTPases need to be geranylgeranyled on either one or two cysteine residues in their C-terminus to localize to the correct intracellular membrane. Mutations in this gene are a cause of choroideremia; also known as tapetochoroidal dystrophy (TCD). This X-linked disease is characterized by progressive dystrophy of the choroid, retinal pigment epithelium and retina. Alternative splicing results in multiple transcript variants encoding different isoforms.[provided by RefSeq, Feb 2009]
P24386 [Direct mapping] Rab proteins geranylgeranyltransferase component A 1
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THUMBUP predicted membrane proteins Predicted intracellular proteins Disease related genes Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)