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AR (Androgen Receptor (dihydrotestosterone receptor; testicular feminization; spinal and bulbar muscular atrophy; Kennedy disease))

Identity

Other namesAIS
DHTR
HUMARA
KD
NR3C4
RP11-383C12.1
SBMA
SMAX1
TFM
Hugo AR
Location Xq12
Local_order Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
Note (dihydrotestosterone receptor; testicular feminization; spinal and bulbar muscular atrophy; Kennedy disease). (1 copy in males; 1 functional copy/cell in females due to X-inactivation).

DNA/RNA

Description 180 kb gene consisting of 8 exons
Transcription 4,314 bp mRNA, 2,762 bp open reading frame

Protein

 
  Layout of the AR gene, mRNA and protein with indicated regulatory regions. Borrowed from Litvinov, et al. 2003, with permission.
Description 919 amino acids (NCBI: P10275), MW = 99,187.57 daltons; -1.5 charge with an isoelectric pt = 6.3797; 10.6 kb AR transcript (NCBI: NM_000044 - partial sequence): 1.1kb 5' Untranslated Region (UTR) followed by the 2.7 kb Open Reading Frame (ORF) followed by the 6.8kb 3' UTR.
AR: AR isoform 1 [Homo sapiens] NP_000035 920 aa
AR45: AR isoform 2 [Homo sapiens] NP_001011645 388 aa
The AR coding sequence contains variable poly-aminoacid repeats in the amino-terminal domain:
1. poly-glutamine (CAG: Glu-Q): avg 22 repeats with normal polymorphic range from 8 to 35, shorter (<18) associated with increased AR transactivation and prostate cancer risk. CAG repeats in spinal and bulbar muscular atrophy patients range from 38 to 62.
2. poly-proline (Pro-P): avg 8.
3. poly-glycine (GGC: Gly-G): avg 23, with normal range from 10 to 31.
Expression Embryonic tissue, prostate, testis, liver, eye, kidney, adrenal glands, thyroid, heart, breast/mammary gland, uterus, skeletal muscle, specific regions of the brain (CNS) including spinal and bulbar motor neurons.
Localisation Cytoplasm and nucleus
Function AR is a member of the steroid hormone receptor family of ligand-dependent nuclear receptors. AR functions include gene expression via actions as a DNA-binding transcription factor, cell cycle/proliferation regulation, cell-to-cell signaling, and intracellular signal transduction, leading to the regulation of biological processes such as development, cellular proliferation, differentiation and apoptosis. Some of the main target genes transcriptionally regulated by AR include AR, prostate specific antigen (PSA/hKlk3), hKlk2, hKlk4, prostate specific membrane antigen (PSMA), prostate stem cell antigen (PSCA), cell cycle regulator p27, vascular endothelial growth factor (VEGF), TMPRSS2, and Nkx3.1.
Prostate organogenesis: The presence of AR is required in the mesodermal-derived embryonic urogenital sinus mesenchyme to trigger branching morphogenesis of endodermal-derived epithelial cells in the presence of androgens; subsequent AR expression in the developing epithelium drives secretory protein production. AR also plays an important role in the development of primary and secondary sexual characteristics, spermatogenesis, hormonal regulation of sexual drive, muscle growth, and male patterning of the brain.
Recent identification of the gene fusion between the 5' end of the AR-regulated serine protease TMPRSS2 (21q22.2) and the 3' end of ETS family of transcription factors ETV1 (7p21.3) and ERG (21q22.3) in a large frequency of prostate cancer cases raises new questions regarding AR function in prostate cancer. The gene rearrangement is thought to result in AR-induced expression of the suspected ETV1 or ERG oncogenes.
Homology zebrafish (Danio rerio), dog (Canis familiaris), African clawed frog (Xenopus laevis), chimpanzee (Pan troglodytes), mouse (Mus musculus), chicken (Gallus gallus), rat (Rattus norvegicus), rainbow trout (Oncorhynchus mykiss).
No similarity-to-human data found for AR for:
pig (Sus scrofa), cow (Bos taurus), fruit fly (Drosophila melanogaster), worm (Caenorhabditis elegans), baker's yeast (Saccharomyces cerevisiae), tropical clawed frog (Silurana tropicalis), African malaria mosquito (Anopheles gambiae), thale cress (Arabidopsis thaliana), green algae (Chlamydomonas reinhardtii), soybean (Glycine max), barley (Hordeum vulgare), tomato (Lycopersicon esculentum), rice blast fungus (Magnaporthe grisea), rice (Oryza sativa), sugarcane (Saccharum officinarum), loblolly pine (Pinus taeda), corn (Zea mays), wheat (Triticum aestivum), Alicante grape (Vitis vinifera), bread mold (Neurospora crassa), fission yeast (Schizosaccharomyces pombe), sea squirt (Ciona intestinalis), amoeba (Dictyostelium discoideum), A. gosspyii yeast (Ashbya gossypii), K. lactis yeast (Kluyveromyces lactis), medicago trunc (Medicago truncatula), malaria parasite (Plasmodium falciparum), schistosome parasite (Schistosoma mansoni), sorghum (Sorghum bicolor), toxoplasmosis (Toxoplasma gondii).

Mutations

Germinal Germ-line loss of function mutations in AR result in non-lethal loss of AR expression, a hallmark of androgen insensitivity syndrome. Individuals with AIS have a Y chromosome and functional testes, which produce high levels of testosterone; however, they lack male sex accessory organs, such as seminal vesicles and prostate, and are thus phenotypically female in both behavior and appearance.
Somatic Various somatic AR mutations have been identified, some of which are associated with prostate cancer, including the T877A mutation in the prostate cancer LNCaP cell line, which permits AR activation by progestins, estrogen, adrenal androgens, and anti-androgen hydroxyflutamide; however, the overall frequency of AR mutations in early, primary prostate cancer is <10%.
Polymorphic CAG repeats in exon 1 encoding a polyglutamine tract of variable length give rise to AR peptides of varying lengths: Shorter length (fewer CAG repeats) is associated with increased prostate cancer risk; increased length (greater CAG repeats) is associated with spinal and bulbar muscular atrophy and androgen insensitivity syndrome. For a more complete list of identified mutations, please visit http://androgendb.mcgill.ca/map.gif.

Implicated in

Disease Androgenic alopecia, spinal and bulbar muscular dystrophy, androgen insensitivity syndrome due to AR mutations, benign prostatic hyperplasia, prostate adenocarcinoma
  
Entity Prostate adenocarcinoma (PCa)
Disease PCa is the most commonly diagnosed cancer in American men and the second leading cause of cancer-related deaths. PCa predominantly occurs in the peripheral zone of the human prostate, with roughly 5 to 10% of cases found in the central zone. Disease development involves the temporal and spatial loss of the basal epithelial compartment accompanied by increased proliferation and de-differentiation of the luminal (secretory) epithelial cells. PCa is a slow developing disease that is typically found in men greater than 40 years of age, with an increasing rate of occurrence with increasing age.
Prognosis Serum PSA testing combined with digital-rectal exams (DRE) are used to screen for the presence of disease. Given a positive DRE exam, additional tests including needle core biopsies are taken to histologically assess disease stage and grade. Localized, prostate-restricted disease is theoretically curable with complete removal of the prostate (radical prostatectomy). Patients with extra-prostatic disease are treated with chemotherapy, hormone (androgen ablation) therapy, radiation, and/or antiandrogens; however, no curative treatments are available for non-organ confined, metastatic disease.
Cytogenetics Various forms of aneuploidy.
Abnormal Protein Unknown.
Oncogenesis Alterations in AR function are associated with the development of PCa due to a transition from paracrine AR signaling, traditionally involving the supporting mesenchyme instructing the terminal differentiation of the luminal epithelial cells, to autocrine AR signaling in luminal epithelial cells that promotes cell proliferation. Roughly 10% of PCa patients harbor AR mutations, suggesting that the prevalence of AR mutations, clinically, is low. Mutations that increase the signaling promiscuity of AR, AR gene amplification, as well as alterations in proteins that regulate AR levels/function contribute to de-regulated AR signaling.
  
Entity Benign Prostatic Hyperplasia (BPH)
Disease Benign growth of the prostate, primarily occurring in the transitional zone of the prostate, results in urinary obstruction and lower urinary tract symptoms. AR function is associated with increased rates of epithelial cell proliferation, leading to increased size of the prostate gland. Originally thought of as benign prostatic hypertrophy, BPH has since been correctly characterized as a hyperplastic condition.
Prognosis Patients with BPH are primarily treated with 2 types of agents to help reduce the size of the prostate, including Alpha-blockers: Flomax (tamsulosin), Uroxatral (alfuzosin), Hytrin (terazosin), Cardura (doxazosin); and 5-Alpha Reductase Inhibitors: Avodart (dutasteride), Proscar (finasteride). For symptoms unabated by medications, minimally invasive procedures: Transurethral microwave therapy (TUMT) and Transurethral needle ablation (TUNA) exist. More invasive surgeries: Transurethral resection of the prostate (TURP), Open prostatectomy (open surgery), Laser surgery, Transurethral incision of the prostate (TUIP) are available.
Oncogenesis Occurring in the transitional zone of the prostate, it is currently believed that BPH does not lead to or initiate the development of PCa.
  
Entity Spinal and bulbar muscular atrophy
Note X-linked recessive form of spinal muscular atrophy
Disease Spinal and bulbar muscular atrophy (SBMA, SMAX1), which is also known as Kennedy disease (KD), is caused by a trinucleotide CAG repeat expansion in exon 1 of the AR gene, resulting in decreased AR mRNA and protein levels. SBMA patients carry 38 to 62 CAG repeats; healthy individuals have 10 to 36.
Prognosis SBMA is a neurodegenerative disease resulting in slow, progressive limb and bulbar muscle weakness, characterized by muscle atrophy due to neuron dysfunction. Also can cause gynecomastia. Current therapies include androgen deprivation therapy to curb the effects of pathologic AR signaling.
  
Entity Androgen insensitivity syndrome (AIS)
Note X-linked recessive disorder
Disease Androgen insensitivity syndrome (AIS), Testicular feminization syndrome (TFM). Affected males have female external genitalia, female breast development, blind vagina, absent uterus and female adnexa, and abdominal or inguinal testes, despite a normal male (2A + XY) karyotype. Caused by mutations in the gene for the androgen receptor.
  

External links

Nomenclature
HugoAR
GDBAR
Entrez_GeneAR  367  androgen receptor (dihydrotestosterone receptor; testicular feminization; spinal and bulbar muscular atrophy; Kennedy disease)
Cards
AtlasARID685chXq12
GeneCardsAR
EnsemblAR [Search_View]   ENSG00000169083 [Gene_View]
GenatlasAR
GeneLynxAR
eGenomeAR
euGene367
Genomic and cartography
GoldenPathAR  -  Xq12   chrX:66705408-66860844 +  Xq11.2-q12    (hg18-Mar_2006)
EnsemblAR - Xq11.2-q12 [CytoView]
NCBIMapview
OMIMDisease map [OMIM]
HomoloGeneAR
Gene and transcription
GenbankAF162704 [ ENTREZ ]
GenbankAF321914 [ ENTREZ ]
GenbankAF321915 [ ENTREZ ]
GenbankAF321916 [ ENTREZ ]
GenbankAF321917 [ ENTREZ ]
RefSeqNM_000044 [ SRS ]    NM_000044 [ ENTREZ ]
RefSeqNM_001011645 [ SRS ]    NM_001011645 [ ENTREZ ]
RefSeqAC_000066 [ SRS ]    AC_000066 [ ENTREZ ]
RefSeqNC_000023 [ SRS ]    NC_000023 [ ENTREZ ]
RefSeqNT_011669 [ SRS ]    NT_011669 [ ENTREZ ]
RefSeqNW_927711 [ SRS ]    NW_927711 [ ENTREZ ]
AceViewAR AceView - NCBI
UnigeneHs.496240 [ SRS ]    Hs.496240 [ NCBI ]     HS496240 [ spliceNest ]
Fast-db9762 (alternative variants)
Protein : pattern, domain, 3D structure
SwissProtP10275 [ SRS]    P10275 [ EXPASY ]     P10275 [ INTERPRO ]
PrositePS00031 NUCLEAR_REC_DBD_1 [ SRS ]    PS00031 NUCLEAR_REC_DBD_1 [ Expasy ]
PrositePS51030 NUCLEAR_REC_DBD_2 [ SRS ]    PS51030 NUCLEAR_REC_DBD_2 [ Expasy ]
InterproIPR001103 Andrgn_rcpt [ SRS ]    IPR001103 Andrgn_rcpt [ EBI ]
InterproIPR008946 Nucl_hormone_rcpt_ligand-bd [ SRS ]    IPR008946 Nucl_hormone_rcpt_ligand-bd [ EBI ]
InterproIPR000536 Nucl_hrmn_rcpt_lig-bd_core [ SRS ]    IPR000536 Nucl_hrmn_rcpt_lig-bd_core [ EBI ]
InterproIPR001628 Znf_hrmn_rcpt [ SRS ]    IPR001628 Znf_hrmn_rcpt [ EBI ]
InterproIPR013088 Znf_NHR/GATA [ SRS ]    IPR013088 Znf_NHR/GATA [ EBI ]
CluSTrP10275
PfamPF02166 Androgen_recep [ SRS ]    PF02166 Androgen_recep [ Sanger ]    pfam02166 [ NCBI-CDD ]
PfamPF00104 Hormone_recep [ SRS ]    PF00104 Hormone_recep [ Sanger ]    pfam00104 [ NCBI-CDD ]
PfamPF00105 zf-C4 [ SRS ]    PF00105 zf-C4 [ Sanger ]    pfam00105 [ NCBI-CDD ]
SmartSM00430 HOLI [EMBL]
SmartSM00399 ZnF_C4 [EMBL]
ProdomPD000035 Znf_C4steroid[INRA-Toulouse]
ProdomP10275 ANDR_HUMAN [ Domain structure ]   P10275 ANDR_HUMAN  [ sequences sharing at least 1 domain ]
BlocksP10275
PDB1E3G [ SRS ]    1E3G [ PdbSum ],   1E3G [ IMB ]   1E3G [ RSDB ]
PDB1GS4 [ SRS ]    1GS4 [ PdbSum ],   1GS4 [ IMB ]   1GS4 [ RSDB ]
PDB1T5Z [ SRS ]    1T5Z [ PdbSum ],   1T5Z [ IMB ]   1T5Z [ RSDB ]
PDB1T63 [ SRS ]    1T63 [ PdbSum ],   1T63 [ IMB ]   1T63 [ RSDB ]
PDB1T65 [ SRS ]    1T65 [ PdbSum ],   1T65 [ IMB ]   1T65 [ RSDB ]
PDB1XJ7 [ SRS ]    1XJ7 [ PdbSum ],   1XJ7 [ IMB ]   1XJ7 [ RSDB ]
PDB1XOW [ SRS ]    1XOW [ PdbSum ],   1XOW [ IMB ]   1XOW [ RSDB ]
PDB1XQ3 [ SRS ]    1XQ3 [ PdbSum ],   1XQ3 [ IMB ]   1XQ3 [ RSDB ]
PDB1Z95 [ SRS ]    1Z95 [ PdbSum ],   1Z95 [ IMB ]   1Z95 [ RSDB ]
PDB2AM9 [ SRS ]    2AM9 [ PdbSum ],   2AM9 [ IMB ]   2AM9 [ RSDB ]
PDB2AMA [ SRS ]    2AMA [ PdbSum ],   2AMA [ IMB ]   2AMA [ RSDB ]
PDB2AMB [ SRS ]    2AMB [ PdbSum ],   2AMB [ IMB ]   2AMB [ RSDB ]
PDB2AO6 [ SRS ]    2AO6 [ PdbSum ],   2AO6 [ IMB ]   2AO6 [ RSDB ]
PDB2AX6 [ SRS ]    2AX6 [ PdbSum ],   2AX6 [ IMB ]   2AX6 [ RSDB ]
PDB2AX7 [ SRS ]    2AX7 [ PdbSum ],   2AX7 [ IMB ]   2AX7 [ RSDB ]
PDB2AX8 [ SRS ]    2AX8 [ PdbSum ],   2AX8 [ IMB ]   2AX8 [ RSDB ]
PDB2AX9 [ SRS ]    2AX9 [ PdbSum ],   2AX9 [ IMB ]   2AX9 [ RSDB ]
PDB2AXA [ SRS ]    2AXA [ PdbSum ],   2AXA [ IMB ]   2AXA [ RSDB ]
PDB2HVC [ SRS ]    2HVC [ PdbSum ],   2HVC [ IMB ]   2HVC [ RSDB ]
PDB2OZ7 [ SRS ]    2OZ7 [ PdbSum ],   2OZ7 [ IMB ]   2OZ7 [ RSDB ]
PDB2PIO [ SRS ]    2PIO [ PdbSum ],   2PIO [ IMB ]   2PIO [ RSDB ]
PDB2PIP [ SRS ]    2PIP [ PdbSum ],   2PIP [ IMB ]   2PIP [ RSDB ]
PDB2PIQ [ SRS ]    2PIQ [ PdbSum ],   2PIQ [ IMB ]   2PIQ [ RSDB ]
PDB2PIR [ SRS ]    2PIR [ PdbSum ],   2PIR [ IMB ]   2PIR [ RSDB ]
PDB2PIT [ SRS ]    2PIT [ PdbSum ],   2PIT [ IMB ]   2PIT [ RSDB ]
PDB2PIU [ SRS ]    2PIU [ PdbSum ],   2PIU [ IMB ]   2PIU [ RSDB ]
PDB2PIV [ SRS ]    2PIV [ PdbSum ],   2PIV [ IMB ]   2PIV [ RSDB ]
PDB2PIW [ SRS ]    2PIW [ PdbSum ],   2PIW [ IMB ]   2PIW [ RSDB ]
PDB2PIX [ SRS ]    2PIX [ PdbSum ],   2PIX [ IMB ]   2PIX [ RSDB ]
PDB2PKL [ SRS ]    2PKL [ PdbSum ],   2PKL [ IMB ]   2PKL [ RSDB ]
PDB2PNU [ SRS ]    2PNU [ PdbSum ],   2PNU [ IMB ]   2PNU [ RSDB ]
PDB2Q7I [ SRS ]    2Q7I [ PdbSum ],   2Q7I [ IMB ]   2Q7I [ RSDB ]
PDB2Q7J [ SRS ]    2Q7J [ PdbSum ],   2Q7J [ IMB ]   2Q7J [ RSDB ]
PDB2Q7K [ SRS ]    2Q7K [ PdbSum ],   2Q7K [ IMB ]   2Q7K [ RSDB ]
PDB2Q7L [ SRS ]    2Q7L [ PdbSum ],   2Q7L [ IMB ]   2Q7L [ RSDB ]
HPRD02437
Protein Interaction databases
DIPP10275
IntActP10275
Polymorphism : SNP, mutations, diseases
OMIM176807;300068;300633;313200;313700    [ map ]   
GENECLINICS176807;300068;300633;313200;313700
SNPAR [dbSNP-NCBI]  
SNPNM_000044 [SNP-NCI]  
SNPNM_001011645 [SNP-NCI]  
SNPAR [GeneSNPs - Utah]  AR] [HGBASE - SRS]
HAPMAPAR [HAPMAP]  
COSMICAR [Somatic mutation (COSMIC-CGP-Sanger)]  
HGMDAR
General knowledge
Family BrowserAR [UCSC Family Browser]
SOURCENM_000044
SOURCENM_001011645
SMDHs.496240
SAGEHs.496240
GOtranscription factor activity [Amigo]  transcription factor activity
GOreceptor activity [Amigo]  receptor activity
GOandrogen receptor activity [Amigo]  androgen receptor activity
GOandrogen receptor activity [Amigo]  androgen receptor activity
GOandrogen binding [Amigo]  androgen binding
GOnucleus [Amigo]  nucleus
GOcytoplasm [Amigo]  cytoplasm
GOregulation of transcription, DNA-dependent [Amigo]  regulation of transcription, DNA-dependent
GOtransport [Amigo]  transport
GOsignal transduction [Amigo]  signal transduction
GOcell-cell signaling [Amigo]  cell-cell signaling
GOsex differentiation [Amigo]  sex differentiation
GOzinc ion binding [Amigo]  zinc ion binding
GOcell proliferation [Amigo]  cell proliferation
GOcell growth [Amigo]  cell growth
GOprostate gland development [Amigo]  prostate gland development
GOsequence-specific DNA binding [Amigo]  sequence-specific DNA binding
GOmetal ion binding [Amigo]  metal ion binding
GOprotein dimerization activity [Amigo]  protein dimerization activity
PubGeneAR
TreeFamAR
Other databases
Probes
ProbeAR Related clones (RZPD - Berlin)
PubMed
PubMed499 Pubmed reference(s) in LocusLink

Bibliography

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Pattern of somatic androgen receptor gene mutations in patients with hormone-refractory prostate cancer.
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PMID 12843129
 
Hormonal, cellular, and molecular regulation of normal and neoplastic prostatic development.
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The Journal of steroid biochemistry and molecular biology. 2004 ; 92 (4) : 221-236.
PMID 15663986
 
[Paradigm shift in clinical trials for neurodegenerative diseases]
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PMID 17447523
 
REVIEW articlesautomatic search in PubMed
Last year publicationsautomatic search in PubMed

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Contributor(s)

Written01-2008Jason D'Antonio
The Johns Hopkins School of Medicine, Laboratory of John T. Isaacs, PhD, Cancer Research, Bldg 1, 1650 Orleans St., Rm 1M40, Baltimore, MD 21231, USA

Citation

This paper should be referenced as such :
D'Antonio J . AR (Androgen Receptor (dihydrotestosterone receptor; testicular feminization; spinal and bulbar muscular atrophy; Kennedy disease)). Atlas Genet Cytogenet Oncol Haematol. January 2008 .
URL : http://AtlasGeneticsOncology.org/Genes/ARID685chXq12.html

© Atlas of Genetics and Cytogenetics in Oncology and Haematology
indexed on : Mon May 12 18:01:45 2008


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