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Pretraga

PTEN

S Wikipedije, slobodne enciklopedije
PTEN
Dostupne strukture
PDBPretraga ortologa:PDBeRCSB
Spisak PDB ID kodova

4O1V,1D5R,2KYL,5BZX,5BUG,5BZZ

Identifikatori
AliasiPTEN
Vanjski ID-jeviOMIM:601728MGI:109583HomoloGene:265GeneCards:PTEN
Lokacija gena (čovjek)
Hromosom 10 (čovjek)
Hrom.Hromosom 10 (čovjek)[1]
Hromosom 10 (čovjek)
Genomska lokacija za PTEN
Genomska lokacija za PTEN
Bend10q23.31Početak87,862,638bp[1]
Kraj87,971,930bp[1]
Lokacija gena (miš)
Hromosom 19 (miš)
Hrom.Hromosom 19 (miš)[2]
Hromosom 19 (miš)
Genomska lokacija za PTEN
Genomska lokacija za PTEN
Bend19 C1|19 28.14 cMPočetak32,734,897bp[2]
Kraj32,803,560bp[2]
Ontologija gena
Molekularna funkcijaphosphoprotein phosphatase activity
phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase activity
phosphatidylinositol-3-phosphatase activity
protein serine/threonine phosphatase activity
protein tyrosine phosphatase activity
protein tyrosine/serine/threonine phosphatase activity
vezivanje enzima
platelet-derived growth factor receptor binding
GO:0001948, GO:0016582 vezivanje za proteine
protein kinase binding
phosphatidylinositol-3,4-bisphosphate 3-phosphatase activity
anaphase-promoting complex binding
vezivanje identičnih proteina
hydrolase activity
lipid binding
ubiquitin-specific protease binding
ionotropic glutamate receptor binding
protein tyrosine kinase binding
inositol-1,3,4,5-tetrakisphosphate 3-phosphatase activity
PDZ domain binding
Ćelijska komponentacitoplazma
postsynaptic membrane
extracellular region
mitohondrija
neuron projection
cytoplasmic side of plasma membrane
jedro
projekcija ćelije
dendritična kičma
myelin sheath adaxonal region
Schmidt-Lanterman incisure
apical plasma membrane
ćelijska membrana
PML body
nukleoplazma
citosol
postsynaptic cytosol
Biološki procesmulticellular organismal response to stress
regulation of neuron projection development
response to zinc ion
positive regulation of TRAIL-activated apoptotic signaling pathway
response to organic substance
GO:1990376 negative regulation of G1/S transition of mitotic cell cycle
regulation of B cell apoptotic process
Angiogeneza
positive regulation of ERK1 and ERK2 cascade
negative regulation of epithelial cell proliferation
long-term depression
positive regulation of excitatory postsynaptic potential
Ćelijska proliferacija
response to ethanol
neuron projection development
cellular response to hypoxia
negative regulation of cell size
negative regulation of cell population proliferation
prepulse inhibition
regulation of myeloid cell apoptotic process
male mating behavior
locomotory behavior
dentate gyrus development
positive regulation of apoptotic signaling pathway
inositol phosphate metabolic process
response to arsenic-containing substance
Memorija
forebrain morphogenesis
dendritic spine morphogenesis
heart development
central nervous system development
negative regulation of axonogenesis
regulation of cellular localization
synapse maturation
learning or memory
socijalno ponašanje
synapse assembly
cellular response to decreased oxygen levels
prostate gland growth
platelet-derived growth factor receptor signaling pathway
negative regulation of dendritic spine morphogenesis
brain morphogenesis
GO:0033128 negative regulation of protein phosphorylation
regulation of cyclin-dependent protein serine/threonine kinase activity
regulation of cellular component size
response to nutrient
negative regulation of synaptic vesicle clustering
postsynaptic density assembly
GO:0016576 protein dephosphorylation
protein stabilization
positive regulation of DNA-binding transcription factor activity
negative regulation of apoptotic process
response to glucose
nervous system development
adult behavior
phosphatidylinositol dephosphorylation
positive regulation of ubiquitin-dependent protein catabolic process
response to inorganic substance
canonical Wnt signaling pathway
phosphatidylinositol biosynthetic process
negative regulation of organ growth
negative regulation of ribosome biogenesis
GO:0098501, GO:0098502, GO:0006286 Defosforilacija
locomotor rhythm
central nervous system myelin maintenance
regulation of axon regeneration
response to estradiol
response to ATP
negative regulation of phagocytosis
GO:1904578 response to organic cyclic compound
protein kinase B signaling
cardiac muscle tissue development
lipid metabolism
GO:0010260 starenje
neuron-neuron synaptic transmission
negative regulation of excitatory postsynaptic potential
presynaptic membrane assembly
regulation of cell cycle
maternal behavior
rhythmic synaptic transmission
positive regulation of cell population proliferation
positive regulation of apoptotic process
negative regulation of ERK1 and ERK2 cascade
Ćelijska migracija
negative regulation of myelination
inositol phosphate dephosphorylation
regulation of synaptic transmission, GABAergic
endothelial cell migration
central nervous system neuron axonogenesis
long-term potentiation
peptidyl-tyrosine dephosphorylation
negative regulation of axon regeneration
negative regulation of cardiac muscle cell proliferation
GO:0090623, GO:1903835, GO:0007092, GO:0051488, GO:0051487 positive regulation of ubiquitin protein ligase activity
protein deubiquitination
negative regulation of epithelial to mesenchymal transition
negative regulation of keratinocyte migration
cellular response to electrical stimulus
negative regulation of wound healing, spreading of epidermal cells
negative regulation of phosphatidylinositol 3-kinase signaling
GO:1901313 positive regulation of gene expression
positive regulation of cardiac muscle cell apoptotic process
response to activity
cellular response to insulin stimulus
cellular response to leptin stimulus
positive regulation of neuron differentiation
cellular response to ethanol
negative regulation of potassium ion transmembrane transporter activity
cellular response to nerve growth factor stimulus
cellular response to insulin-like growth factor stimulus
negative regulation of signaling receptor activity
negative regulation of protein kinase B signaling
GO:0097285 apoptoza
negative regulation of cell migration
regulation of protein stability
negative regulation of focal adhesion assembly
negative regulation of vascular associated smooth muscle cell proliferation
transcription initiation from RNA polymerase II promoter
negative regulation of cyclin-dependent protein serine/threonine kinase activity
negative regulation of neuron projection development
Izvori:Amigo /QuickGO
Ortolozi
VrsteČovjekMiš
Entrez

5728

19211

Ensembl

ENSG00000171862
ENSG00000284792

ENSMUSG00000013663

UniProt

P60484

O08586

RefSeq (mRNK)

NM_000314
NM_001304717
NM_001304718

NM_008960
NM_177096

RefSeq (bjelančevina)

NP_000305
NP_001291646
NP_001291647
NP_000305.3

NP_032986

Lokacija (UCSC)Chr 10: 87.86 – 87.97 MbChr 19: 32.73 – 32.8 Mb
PubMed pretraga[3][4]
Wikipodaci
Pogledaj/uredi – čovjekPogledaj/uredi – miš
Regulcija iposttranslacijske modifikacije gena PTEN

Homolog fosfataze i tenzina (PTEN) jefosfataza koja je kodljudikodiranagenomPTEN.[5]Mutacije ovog gena korak su u razvoju mnogihkancera, posebno glioblastoma,raka pluća,dojke iprostate. Geni koji odgovaraju PTEN-u (ortolozi)[6] su identificirani kod većinesisara za koje su dostupni potpuni podaci ogenomu.

PTEN djeluje kaogen supresije tumora, djelovanjem svog proteinskog proizvoda fosfataze. Ovafosfataza uključena je u regulacijućelijskog ciklusa, sprječavajući ćelije da rastu i dijele se prebrzo.[7] Meta je mnogih lijekova protiv raka.

Protein kodiran ovim genom jefosfatidilinositol-3,4,5-trisfosfat 3-fosfataza. Sadrži domen sličantenzinu, kao i katalitski domen sličan onom kod dvostruke specifičnostiproteiskih tiroziđn-fosfataza. Za razliku od većine proteinskih tirozin-fosfataza, ovaj protein prvenstveno defosforilirafosfoinozitidne supstrate. Negativno regulira unutarćelijske razinefosfatidilinositol-3,4,5-trisfosfata u ćelijama i funkcionira kao supresor tumora, negativnom regulacijomAkt/PKB signalnog puta.[8]

Aminokiselinska sekvenca

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Dužinapolipeptidnog lanca je 403aminokiseline, аmolekulska težina 47.166Da.[9]

1020304050
MTAIIKEIVSRNKRRYQEDGFDLDLTYIYPNIIAMGFPAERLEGVYRNNI
DDVVRFLDSKHKNHYKIYNLCAERHYDTAKFNCRVAQYPFEDHNPPQLEL
IKPFCEDLDQWLSEDDNHVAAIHCKAGKGRTGVMICAYLLHRGKFLKAQE
ALDFYGEVRTRDKKGVTIPSQRRYVYYYSYLLKNHLDYRPVALLFHKMMF
ETIPMFSGGTCNPQFVVCQLKVKIYSSNSGPTRREDKFMYFEFPQPLPVC
GDIKVEFFHKQNKMLKKDKMFHFWVNTFFIPGPEETSEKVENGSLCDQEI
DSICSIERADNDKEYLVLTLTKNDLDKANKDKANRYFSPNFKVKLYFTKT
VEEPSNPEASSSTSVTPDVSDNEPDHYRYSDTTDSDPENEPFDEDQHTQI
TKV
C:Cistein
D:Asparaginska kiselina
E:Glutaminska kiselina
F:Fenilalanin
G:Glicin
H:Histidin
I:Izoleucin
K:Lizin
L:Leucin
M:Metionin
N:Asparagin
P:Prolin
Q:Glutamin
R:Arginin
S:Serin
T:Treonin
V:Valin
W:Triptofan
Y:Tirozin

Funkcija

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Protein PTEN djeluje kaofosfataza za defosforilacijufosfatidilinozitol (3,4,5)-trisfosfata (PtdIns (3,4,5)P3 ili PIP3). PTEN specifično kataliziradefosforilaciju 3' fosfatnoginozitolskog prstena u PIP3, što rezultira bifosfatnim proizvodom PIP2 (PtdIns (4,5) P2). Ova defosforilacija je važna jer rezultira inhibicijomAkt-signalnog puta, koji ima važnu ulogu u regulaciji ćelijskog ponašanja, poputrasta, preživljavanja i migracija.

PTEN također ima slabu aktivnost proteinskihfosfataza, ali je ta aktivnost također ključna za njegovu ulogusupresora tumora. Aktivnost proteinske fosfataze PTEN -a može biti uključena u regulacijućelijskog ciklusa, sprječavajući ćelije da rastu i dijele se prebrzo.[7] Bilo je mnogo prijavljenih proteinskihsupstrat za PTEN, uključujućiIRS1[10] ineuređene.[11]

PTEN je jedna od meta kandidata za lijekove kao što suonkomir iMIRN21.

Struktura

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Struktura PTEN-ovog jezgra (riješenokristalografijom rendgenskih zraka, vidi sliku u gornjem desnom uglu[12]) otkriva da se prvenstveno sastoji odfosfataznog iC2-domena: fosfatazni domen sadržiaktivno mjesto, koje obavljaenzimsku funkciju proteina, dok C2-domen vežefosfolipidnu membranu. Tako PTEN veže membranu putem svojih domena fosfataze i C2, dovodeći aktivno mjesto na PIP3 vezan za membranu, kako bi je defosforilirao.

Dva domena PTEN -a,tirozin-fosfatazni i C2-domen, naslijeđeni su zajedno kao jedna jedinica i stoga čine superdomen, ne samo u PTEN -u, već i u raznim drugim proteinima ugljivama,biljkama iživotinjama, naprimjer,tenzinski proteini iauksilin.[13]

Aktivno mjesto PTEN -a sastoji se od tri petlje,TI,P ipetlja WPD, a sve su imenovane prema nomenklaturiPTPB1.[12] Zajedno čine neobično dubok i širok džep, koji omogućava PTEN-u da primi glomaznufosfatidilinozitol 3,4,5-trisfosfatmu podlogu. Smatra se da mehanizam reakcije defosforilacije PTEN-a prolazi krozfosfoenzimski intermedijar, sa stvaranjemfosfodiesterske veze na aktivnom mjestucisteina, C124.

U kristalnoj strukturi PTEN-a nije prisutan kratki 10-aminokiselinska nestrukturirana regijaN-terminalnog domena fosfataze (od ostataka 6 do 15), poznata pod različitim imenima PIP2 vezni domen (PBD) ili PIP2 vezni motiv (PBM)[14][15][16] Ovo područje povećava afinitet PTEN-a za plazmamembranu vezivanjem zafosfatidilinositol 4,5-bisfosfat ili eventualno bilo koji anionskilipid.

U kristalnoj strukturi također nije prisutanunutrašnje neuređenaC-terminalna regija (CTR) (obuhvata ostatke 353–403). CTR je konstitutivnofosforiliran na različitim položajima, koji utiču na različite aspekte PTEN-a, uključujući njegovu sposobnost vezanja na lipidne membrane, a djeluju i kao protein ili lipidnafosfataza.[17][18]

Osim toga, PTEN se može eksprimirati i kao PTEN-L[19] (poznat kao PTEN-Long ili PTEN-α[20]), alternativna varijanta početnog mjesta inicijatoraleucina, koja dodaje dodatne 173 aminokiseline naN-kraj PTEN-a. Tačna uloga ovog produženja aminokiselina još nije poznata, niti uzrokujuće izlučivanje PTEN-a iz ćelije ili interakciju smitohondrijama. Predviđeno je da će produžetak N-terminala biti u velikoj mjeri poremećen,[21] iako postoje dokazi da ima neka struktura u posljednjih dvadeset aminokiselina ekstenzije (najproksimalnije do početka PTEN -ovogmetionina).[18]

Klinički značaj

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Kancer

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PTEN je jedan od najčešće izgubljenihgena supresije tumora u ljudskim kancerima; u stvari, procjenjuje se da je do 70% muškaraca s rakom prostate u vrijeme postavljanja dijagnoze izgubilo kopiju gena "PTEN".[22] Brojna istraživanja otkrila su povećanu učestalost gubitkaPTEN-a u tumorima koji su jače vidljivi na dijagnostičkim snimcima kao što jempMRI, što potencijalno odražava povećanuproliferaciju i ćelijske gustoće u ovim tumorima.[23]

Tokom razvoja tumora dolazi domutacija idelecija PTEN-a koje inaktiviraju njegovu enzimsku aktivnost što dovodi do povećanećelijske proliferacije i smanjene ćelijske smrtnosti. Česta genetička inaktivacija PTEN -a javlja se kodglioblastoma,raka endometrija iraka prostate; smanjena ekspresija se nalazi u mnogim drugim tipovima tumora, poputraka pluća idojke. Nadalje, mutacijaPTEN također uzrokuje niz nasljednih predispozicija za rak.

Neokancerozna neoplazija

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Identificirano je više od 70mutacija u genuPTEN kod ljudi saCowdenovim sindromom. Ove mutacije se mogu promijeniti u malom brojuparova baza ili, u nekim slučajevima, delecijom velikog broja parova baza. Većina ovih mutacija uzrokuje da genPTEN pravi protein koji ne radi ispravno ili uopće ne radi. Neispravan protein ne može zaustavitidiobu črlija ili signalizirati abnormalnim ćelijama da umru, što može dovesti do rasta tumora, posebno udojkama,štitnjači ilimaternici.[24]

Mutacije u genu "PTEN" uzrokuju nekoliko drugih poremećaja koje, poput Cowdenovog sindroma, karakterizira razvoj nekanceroznih tumora nazvanihhamartomi. Ovi poremećaji uključujuBannayan-Riley-Ruvalcabain sindrom isindrom sličan Proteusu. Zajedno, poremećaji uzrokovani mutacijamaPTEN-a nazivaju sePTEN sindrom hamartomskog tumora ili PHTS. Mutacije odgovorne za ove sindrome uzrokuju da rezultirajući protein bude nefunkcionalan ili odsutan. Neispravan protein omogućava ćeliji da se nekontrolirano dijeli i sprječava umiranje oštećenih ćelija, što može dovesti do rasta tumora.

Funkcija mozga i autizam

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Defekti genaPTEN navode se kao potencijalni uzrok poremećaja spektraautizma.[25]

Kada je neispravan, proteinPTEN stupa u interakciju s proteinom drugog gena poznatog kaoTp53, kako bi umanjio proizvodnju energije uneuronima. Ovaj teški stres dovodi do skoka štetnih promjenaDNK umitohondrijama i abnormalnih razina proizvodnje energije umalom mozgu ihipokampusu, regijama mozga koje su kritične za društvenoponašanje i spoznaju. Kada je protein PTEN nedovoljan, njegova interakcija sap53 izaziva i nedostatke u drugim proteinima koji su takođe pronađeni kod pacijenata sapoteškoćama u učenju uključujućiautizam.[26]

Pacijenti s neispravnimPTEN-om mogu razviti lezije cerebelarne mase zvane displazijski gangliocitom iliLhermitte-Duclosovu bolest.[24]

Regeneracija ćelija

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Snažna veza PTEN-a s inhibicijomrasta ćelija proučava se kao mogućaterapijska meta u tkivima koja se obično ne regeneriraju u zrelim životinjama, poput središnjihneurona. Pokazalo se nedavno dadelecijska mutacija PTEN-a[27] dopušta regeneraciju živaca kodmiševa.[28][29]

Kao cilj lijekova

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PTEN inhibitori

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Spojevubisperoksovanadija mogu imati neuroprotektivni učinak nakon ozljedeCNS-a.[30] PTEN ise inhibirasarkopoterijem.[31]

Ćelijske linije

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Ćelijske linije sa poznatim PTEN mutacijama uključuju:

Interakcija genaAkt i PTEN

Interakcije

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Pokazano je da gen PTEN imainterakcije sa:

Također pogledajte

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Reference

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  1. ^abcENSG00000284792 GRCh38: Ensembl release 89: ENSG00000171862, ENSG00000284792 -Ensembl, maj 2017
  2. ^abcGRCm38: Ensembl release 89: ENSMUSG00000013663 -Ensembl, maj 2017
  3. ^"Human PubMed Reference:".National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^"Mouse PubMed Reference:".National Center for Biotechnology Information, U.S. National Library of Medicine.
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  6. ^"OrthoMaM phylogenetic marker: PTEN coding sequence". Arhivirano soriginala, 27. 12. 2016. Pristupljeno 4. 9. 2021.
  7. ^abChu EC, Tarnawski AS (oktobar 2004)."PTEN regulatory functions in tumor suppression and cell biology".Medical Science Monitor.10 (10): RA235–41.PMID 15448614.
  8. ^"Entrez Gene: PTEN phosphatase and tensin homolog (mutated in multiple advanced cancers 1)".
  9. ^"UniProt, P60484". Pristupljeno 4. 9. 2021.
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  11. ^Shnitsar I, Bashkurov M, Masson GR, Ogunjimi AA, Mosessian S, Cabeza EA, Hirsch CL, Trcka D, Gish G, Jiao J, Wu H, Winklbauer R, Williams RL, Pelletier L, Wrana JL, Barrios-Rodiles M (septembar 2015)."PTEN regulates cilia through Dishevelled".Nature Communications.6: 8388.Bibcode:2015NatCo...6.8388S.doi:10.1038/ncomms9388.PMC 4598566.PMID 26399523.
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  18. ^abMasson GR, Perisic O, Burke JE, Williams RL (januar 2016)."The intrinsically disordered tails of PTEN and PTEN-L have distinct roles in regulating substrate specificity and membrane activity".The Biochemical Journal.473 (2): 135–44.doi:10.1042/BJ20150931.PMC 4700475.PMID 26527737.
  19. ^Hopkins BD, Fine B, Steinbach N, Dendy M, Rapp Z, Shaw J, Pappas K, Yu JS, Hodakoski C, Mense S, Klein J, Pegno S, Sulis ML, Goldstein H, Amendolara B, Lei L, Maurer M, Bruce J, Canoll P, Hibshoosh H, Parsons R (juli 2013)."A secreted PTEN phosphatase that enters cells to alter signaling and survival".Science.341 (6144): 399–402.Bibcode:2013Sci...341..399H.doi:10.1126/science.1234907.PMC 3935617.PMID 23744781.
  20. ^Liang H, He S, Yang J, Jia X, Wang P, Chen X, Zhang Z, Zou X, McNutt MA, Shen WH, Yin Y (maj 2014)."PTENα, a PTEN isoform translated through alternative initiation, regulates mitochondrial function and energy metabolism".Cell Metabolism.19 (5): 836–48.doi:10.1016/j.cmet.2014.03.023.PMC 4097321.PMID 24768297.
  21. ^Malaney P, Uversky VN, Davé V (novembar 2013). "The PTEN Long N-tail is intrinsically disordered: increased viability for PTEN therapy".Molecular BioSystems.9 (11): 2877–88.doi:10.1039/c3mb70267g.PMID 24056727.
  22. ^Chen Z, Trotman LC, Shaffer D, Lin HK, Dotan ZA, Niki M, Koutcher JA, Scher HI, Ludwig T, Gerald W, Cordon-Cardo C, Pandolfi PP (august 2005)."Crucial role of p53-dependent cellular senescence in suppression of Pten-deficient tumorigenesis".Nature.436 (7051): 725–30.Bibcode:2005Natur.436..725C.doi:10.1038/nature03918.PMC 1939938.PMID 16079851.
  23. ^Norris, Joseph M.; Simpson, Benjamin S.; Parry, Marina A.; Allen, Clare; Ball, Rhys; Freeman, Alex; Kelly, Daniel; Kim, Hyung L.; Kirkham, Alex; You, Sungyong; Kasivisvanathan, Veeru (1. 7. 2020)."Genetic Landscape of Prostate Cancer Conspicuity on Multiparametric Magnetic Resonance Imaging: A Systematic Review and Bioinformatic Analysis".European Urology Open Science (jezik: engleski).20: 37–47.doi:10.1016/j.euros.2020.06.006.ISSN 2666-1683.PMC 7497895.PMID 33000006.
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  25. ^Napoli E, Ross-Inta C, Wong S, Hung C, Fujisawa Y, Sakaguchi D, Angelastro J, Omanska-Klusek A, Schoenfeld R, Giulivi C (2012)."Mitochondrial dysfunction in Pten haplo-insufficient mice with social deficits and repetitive behavior: interplay between Pten and p53".PLOS ONE.7 (8): e42504.Bibcode:2012PLoSO...742504N.doi:10.1371/journal.pone.0042504.PMC 3416855.PMID 22900024.
  26. ^https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3416855Ljudi s autizmom i mutacijama genaPTEN mogu imatimakrocefaliju (neobično velike glave).<ref>Charney, Dennis S.; Sklar, Pamela B.; Nestler, Eric J.; Buxbaum, Joseph D. (2018).Charney & Nestler's Neurobiology of Mental Illness (jezik: engleski). Oxford University Press. str. 846.ISBN 9780190681425.
  27. ^"Rodent of the Week: Nerves regenerated after spinal cord injury".The Los Angeles Times. 13. 8. 2010.
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  38. ^Freeman DJ, Li AG, Wei G, Li HH, Kertesz N, Lesche R, Whale AD, Martinez-Diaz H, Rozengurt N, Cardiff RD, Liu X, Wu H (februar 2003)."PTEN tumor suppressor regulates p53 protein levels and activity through phosphatase-dependent and -independent mechanisms".Cancer Cell.3 (2): 117–30.doi:10.1016/S1535-6108(03)00021-7.PMID 12620407.
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3.1.1:Carboxylic
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3.1.11-16:
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3.1.21-31:
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