Prion Protein, Antibody

For Research Use Only. Not for use in diagnostic procedures.

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Prion protein is the protein responsible for human Creutzfeldt-Jakob Disease (CJD), and somatic mutations of the prion gene are responsible for Gerstmann-Straussler-Scheinker disease and Fatal Familial Insomnia. The bovine homolog of the prion protein is responsible for bovine Spongioform Encephalopathy (BSE), also known as "Mad Cow Disease." In all cases, the prion protein has two folding states, with one state being the "normal" non-pathological form, and the other state inducing a spongioform encephalopathy.

Normal prion proteins produced naturally in the brain interact with the amyloid-b peptides that are hallmarks of Alzheimer's disease. Blocking this interaction in preparations made from mouse brains halted some neurological defects caused by the accumulation of amyloid-b peptide. It was previously thought that only infectious prion proteins, rather than their normal, non-infectious counterparts, played a role in brain degeneration (Nature, doi:10.1038/news.2009.121).

Antibodies; Neurodegenerative Disease; Prion Protein/CD230

Immunocytochemistry (ICC)

Image: Prion Protein staining of cultured fibroblasts cells transiently transfected with a plasmid containing the prion protein cDNA.

8,691 Da

prion protein

alternative prion protein; major prion protein

Major prion protein

ALTPRP; PRIP; PRP; PrP  [Similar Products]

PRIO_HUMAN

The protein encoded by this gene is a membrane glycosylphosphatidylinositol-anchored glycoprotein that tends to aggregate into rod-like structures. The encoded protein contains a highly unstable region of five tandem octapeptide repeats. This gene is found on chromosome 20, approximately 20 kbp upstream of a gene which encodes a biochemically and structurally similar protein to the one encoded by this gene. Mutations in the repeat region as well as elsewhere in this gene have been associated with Creutzfeldt-Jakob disease, fatal familial insomnia, Gerstmann-Straussler disease, Huntington disease-like 1, and kuru. An overlapping open reading frame has been found for this gene that encodes a smaller, structurally unrelated protein, AltPrp. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2012]

PRNP: May play a role in neuronal development and synaptic plasticity. May be required for neuronal myelin sheath maintenance. May play a role in iron uptake and iron homeostasis. Soluble oligomers are toxic to cultured neuroblastoma cells and induce apoptosis (in vitro). Association with GPC1 (via its heparan sulfate chains) targets PRNP to lipid rafts. Also provides Cu(2+) or ZN(2+) for the ascorbate-mediated GPC1 deaminase degradation of its heparan sulfate side chains. PrP is found in high quantity in the brain of humans and animals infected with neurodegenerative diseases known as transmissible spongiform encephalopathies or prion diseases, like: Creutzfeldt-Jakob disease (CJD), fatal familial insomnia (FFI), Gerstmann-Straussler disease (GSD), Huntington disease-like type 1 (HDL1) and kuru in humans; scrapie in sheep and goat; bovine spongiform encephalopathy (BSE) in cattle; transmissible mink encephalopathy (TME); chronic wasting disease (CWD) of mule deer and elk; feline spongiform encephalopathy (FSE) in cats and exotic ungulate encephalopathy (EUE) in nyala and greater kudu. The prion diseases illustrate three manifestations of CNS degeneration: (1) infectious (2) sporadic and (3) dominantly inherited forms. TME, CWD, BSE, FSE, EUE are all thought to occur after consumption of prion-infected foodstuffs. Defects in PRNP are the cause of Creutzfeldt-Jakob disease (CJD). CJD occurs primarily as a sporadic disorder (1 per million), while 10-15% are familial. Accidental transmission of CJD to humans appears to be iatrogenic (contaminated human growth hormone (HGH), corneal transplantation, electroencephalographic electrode implantation, etc.). Epidemiologic studies have failed to implicate the ingestion of infected annimal meat in the pathogenesis of CJD in human. The triad of microscopic features that characterize the prion diseases consists of (1) spongiform degeneration of neurons, (2) severe astrocytic gliosis that often appears to be out of proportion to the degree of nerve cell loss, and (3) amyloid plaque formation. CJD is characterized by progressive dementia and myoclonic seizures, affecting *****s in mid-life. Some patients present sleep disorders, abnormalities of high cortical function, cerebellar and corticospinal disturbances. The disease ends in death after a 3-12 months illness. Defects in PRNP are the cause of fatal familial insomnia (FFI). FFI is an autosomal dominant disorder and is characterized by neuronal degeneration limited to selected thalamic nuclei and progressive insomnia. Defects in PRNP are the cause of Gerstmann-Straussler disease (GSD). GSD is a heterogeneous disorder and was defined as a spinocerebellar ataxia with dementia and plaquelike deposits. GSD incidence is less than 2 per 100 million live births. Defects in PRNP are the cause of Huntington disease-like type 1 (HDL1). HDL1 is an autosomal dominant, early onset neurodegenerative disorder with prominent psychiatric features. Defects in PRNP are the cause of kuru (KURU). Kuru is transmitted during ritualistic cannibalism, among natives of the New Guinea highlands. Patients exhibit various movement disorders like cerebellar abnormalities, rigidity of the limbs, and clonus. Emotional lability is present, and dementia is conspicuously absent. Death usually occurs from 3 to 12 month after onset. Defects in PRNP are the cause of spongiform encephalopathy with neuropsychiatric features (SENF); an autosomal dominant presenile dementia with a rapidly progressive and protracted clinical course. The dementia was characterized clinically by frontotemporal features, including early personality changes. Some patients had memory loss, several showed aggressiveness, hyperorality and verbal stereotypy, others had parkinsonian symptoms. Belongs to the prion family. 2 isoforms of the human protein are produced by alternative initiation.

Protein type: Membrane protein, GPI anchor; Microtubule-binding

Chromosomal Location of Human Ortholog: 20p13

Cellular Component: Golgi apparatus; mitochondrial outer membrane; extrinsic to membrane; cell surface; endoplasmic reticulum; cytoplasm; integral to membrane; plasma membrane; nucleus; lipid raft

Molecular Function: tubulin binding; identical protein binding; ATP-dependent protein binding; protein binding; copper ion binding; chaperone binding; microtubule binding

Biological Process: axon guidance; cellular copper ion homeostasis; metabolic process; negative regulation of activated T cell proliferation; negative regulation of transcription factor activity; negative regulation of T cell receptor signaling pathway; negative regulation of interleukin-2 production; response to cadmium ion; regulation of protein localization; negative regulation of interleukin-17 production; learning and/or memory; negative regulation of protein amino acid phosphorylation; negative regulation of interferon-gamma production; response to oxidative stress; cell cycle arrest; protein homooligomerization; negative regulation of apoptosis

Disease: Gerstmann-straussler Disease; Huntington Disease-like 1; Kuru, Susceptibility To; Fatal Familial Insomnia; Creutzfeldt-jakob Disease; Spongiform Encephalopathy With Neuropsychiatric Features

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