GTP-binding protein Rheb also known as Ras homolog enriched in brain (RHEB) is a protein

Protein

Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of...

 that in humans is encoded by the RHEB gene

Gene

A gene is a molecular unit of heredity of a living organism. It is a name given to some stretches of DNA and RNA that code for a type of protein or for an RNA chain that has a function in the organism. Living beings depend on genes, as they specify all proteins and functional RNA chains...

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Function

Rheb is a recently discovered member of the Ras

Ras

Ras is the name given to a family of related proteins found inside cells, including human cells. All Ras protein family members belong to a class of protein called small GTPase, and are involved in transmitting signals within cells...

 superfamily that may be involved in neural plasticity. This function is novel and not typically associated with the Ras proteins.

This gene is a member of the small GTPase

GTPase

GTPases are a large family of hydrolase enzymes that can bind and hydrolyze guanosine triphosphate . The GTP binding and hydrolysis takes place in the highly conserved G domain common to all GTPases.-Functions:...

 superfamily and encodes a lipid-anchored, cell membrane protein with five repeats of the RAS-related GTP-binding region. This protein is vital in regulation of growth and cell cycle

Cell cycle

The cell cycle, or cell-division cycle, is the series of events that takes place in a cell leading to its division and duplication . In cells without a nucleus , the cell cycle occurs via a process termed binary fission...

 progression due to its role in the insulin

Insulin

Insulin is a hormone central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen in the liver and muscle....

 / TOR

Mammalian target of rapamycin

The mammalian target of rapamycin also known as mechanistic target of rapamycin or FK506 binding protein 12-rapamycin associated protein 1 is a protein which in humans is encoded by the FRAP1 gene...

 / S6K

P70-S6 Kinase 1

Ribosomal protein S6 kinase beta-1 is an enzyme that in humans is encoded by the RPS6KB1 gene.-Interactions:P70-S6 Kinase 1 has been shown to interact with CSNK2B, EIF3B, COASY, KIAA1303, POLDIP3, Mammalian target of rapamycin, PPP2R2A, RBX1 and Ubiquitin C.-References:...

 signaling pathway. The protein has GTPase activity and shuttles between a GDP

Guanosine diphosphate

Guanosine diphosphate, abbreviated GDP, is a nucleoside diphosphate. It is an ester of pyrophosphoric acid with the nucleoside guanosine. GDP consists of the pyrophosphate group, the pentose sugar ribose, and the nucleobase guanine....

-bound form and a GTP

Guanosine triphosphate

Guanosine-5'-triphosphate is a purine nucleoside triphosphate. It can act as a substrate for the synthesis of RNA during the transcription process...

-bound form, and farnesylation of the protein is required for this activity. Three pseudogenes have been mapped, two on chromosome 10 and one on chromosome 22.

Interactions

RHEB has been shown to interact

Protein-protein interaction

Protein–protein interactions occur when two or more proteins bind together, often to carry out their biological function. Many of the most important molecular processes in the cell such as DNA replication are carried out by large molecular machines that are built from a large number of protein...

 with C-Raf

C-Raf

RAF proto-oncogene serine/threonine-protein kinase also known as proto-oncogene c-RAF or simply c-Raf is an enzyme that in humans is encoded by the RAF1 gene. The c-Raf protein functions in the MAPK/ERK signal transduction pathway as part of a protein kinase cascade...

, Mammalian target of rapamycin

Mammalian target of rapamycin

The mammalian target of rapamycin also known as mechanistic target of rapamycin or FK506 binding protein 12-rapamycin associated protein 1 is a protein which in humans is encoded by the FRAP1 gene...

, TSC2

TSC2

Tuberous sclerosis protein 2, also known as TSC2 and Tuberin, is a human protein and gene.-Interactions:TSC2 has been shown to interact with FOXO1, GSK3B, Peptidylglycine alpha-amidating monooxygenase, RAP1A, MAPK1, AKT1, AXIN1, TSC1, PTK2, Protein kinase, AMP-activated, alpha 1, YWHAZ, RPS6KA1,...

, Ataxia telangiectasia mutated

Ataxia telangiectasia mutated

Ataxia telangiectasia mutated is a serine/threonine protein kinase that is recruited and activated by DNA double-strand breaks. It phosphorylates several key proteins that initiate activation of the DNA damage checkpoint, leading to cell cycle arrest, DNA repair or apoptosis...

, KIAA1303

KIAA1303

Regulatory-associated protein of mTOR is an adapter protein that is encoded in humans by the RPTOR gene. Two mRNAs from the gene have been identified that encode proteins of 1335 and 1177 amino acids long....

 and Ataxia telangiectasia and Rad3 related

Ataxia telangiectasia and Rad3 related

Serine/threonine-protein kinase ATR also known as ataxia telangiectasia and Rad3-related protein or FRAP-related protein 1 is an enzyme that in humans is encoded by the ATR gene...

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