human dipeptidyl peptidase iii: insights into ligand ......auksin amidohidrolaza iz repice...
TRANSCRIPT
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Računalne simulacije
biomakromolekula
Sanja Tomić
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Grupe za modeliranje
biomakromolekula na IRB-u
• LKBK – ST
– Branimir Bertoša
– Marina Grabar
– Antonija Tomić
• Grupa za teorijsku kemiju– David Smith
– Danijela Barić
– Boris Kovačević
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Proteini i njihovi kompleksi
Struktura, fleksibilnost, funkcija
Kompleksi s nukleinskim
kiselinama
Kataliza enzima
Kemijske reakcije
potpomognute enzimima
106 CPU h
105-106 CPU h106 CPU h
Godišnje potrebe - LKBK
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1-2 makromolekule +
ca 10- 40 000 molekula vode
(50-100)x103 atoma
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U = 1/2 veta kb (b-b0)2 + 1/2 valentni kut ka (a-a0)
2 +
1/2 torzijski kut kt [ 1+ cos(n - ) ] +
ij[qiqj/Rij + (Aij/Rij12- Bij/Rij
6)]
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Tk
mv
b
bevTk
mdvvP
222
3 2
24)(
Kordinate i brzine atoma u sustavu u koji je uvedena toplina određuju se u
skladu s jednadžbom gibanja-
Newton-ova
Fi(r)= mi · d2x(t)/dt2 = mi · 1/M (-grad U(x)) ...
ilir Langevin - ova
iiiiii amtSvrF
)()(
Početne brzine:
Vremenski korak = 1- 2 fs :
Eik=mv2/2=3/2.kT Ek=3/2N.kT
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12/2/2010
Stanja sistema koji se uzorkuje tijekom simulacije = trajektorija
12/2/2010
ŠMF-ML
Δt=1-2 fs
film
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10 000 CPUh
Kompleks UMP s adeninskim konjugatom bis-fenantridina
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Ca 100 000 CPU h
2x 16 procesora oko 3 mjeseca
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Humana dipeptidil peptidaza III (DPP III) Zn- (exo) peptidaza
Hidrolizira cijepanje dipeptida od N kraja supstratnih peptida (3 i vise AK)
Koncentracije DPPIII u tkivima kod ljudi:tkivo koncentracija(citosol) (ng DPP III/µg ukupne koncentracije proteina.)
Mozak 0,55Leđna moždina 0,62jetra 0,41bubreg 0,32slezena 0,36želudac 0,75Tanko crijevo 0,18
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Fiziološka uloga ljudske-DPP III
• Unutarstanični katabolizam proteina
• Sudjeluje u regulaciji boli
• Sudjeluje u endogenoj obrani od oksidativnog stresa
Imunohistokemijska
lokalizacija: “superficial
laminae”, cells arround
central channel in the spinal
cord (Chiba i sur., 2003),
Endogeni opoidni peptidi
enkefalini and endomorfini
locirani u istom predjelu
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Patofiziološka uloga DPPIII
- Kataraktogeneza
- Rast tumora
- biomarker za izloženost bisfenolu A
(kemikalija koja narušava status endokrinih žlijezda)
- h-DPP III 67% identičnost s komponentom zmijskog otrova
Novi toksin koji uvjetuje hipotenziju
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• Obitelj DPPIII proteina
• 5 kraljevstva
Bakteria, Protista, Fungi, Plantae, Animalia
Molekularna masa ~80-86 kDa
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Kristalografska vs MM struktura
3CSK and 3FVY
30 ns MD simulacije oko 18 tjedana
na 16 procesora (oko 50 000 CPU h)
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Vezanje liganada
Tyr-Phe-hydroxamate (Tyr-Phe-NHOH) Arg-Arg-naphthlyamide (RRNA)
INHIBITOR: SUPSTRAT
- AUTODOCK
- STEERED MOLECULAR DYNAMICS (SMD)
- MD SIMULATIONS
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WT - RRNA
NH2
+NH
NH
NH2
NH3
+
NH2
+
O
NH
NH2
O
NH
Zn2+His450
His455
O
O Glu451-
O
O-
Glu508
OH2
Asp372
Ser504
Mutant -H568N - RRNA
NH2
+NH
NH
NH2
NH3
+
NH2
+
O
NH
NH2
O
NH
Zn2+His450
His455
O
O Glu451-
O
O-
Glu508
OH2
Asp372
Asn568
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WT - INH
NH NH3
+O
O
NH OH
OH
Zn2+His450
His455
O
O Glu451-
O
O-
Glu508
OH2
Asp372
NH NH3
+O
O
N OH
H
OH
Zn2+His450
His455
O
O Glu451-
O
O-
Glu508
OH2
Asp372
OH2
H568N - INH
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-2
-1,5
-1
-0,5
0
0,5
1
1,5
2
2,5
3
3,5
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700
RM
SF
/A
residue number
free DPP III WT-RRNA H568N-RRNA
Fluktuacije AK u zadnje dvije ns MD simulacija od ukupno 30 ns
ca 150 - 200 000 CPU h11-12 weeks on 3 x 16 processors
H-dipeptidil peptidaza – III: bez vezanog liganda i u kompleksu – divlji tip i mutant
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-1
-0.5
0
0.5
1
1.5
2
2.5
3
0 100 200 300 400 500 600 700
residue number
(RM
SF
-<R
MS
F>
)/Å
DPP III STDEV 2*STDEV
Humana dipeptidil peptidaza III
30 ns MD simulacije oko 4+ mjeseca
na 16 procesora (oko 50 000 CPU h)
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2 x 50 000 CPUhOko 3 mjesecana 32 procesora16 svaki
Ljudska dipeptidil peptidaza – III: bez vezanog liganda i u kompleksu
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Komparativno modeliranjeDokiranje 1 sat – 1 dan na 1 procesoruStabilnost oko 10 tjedana 16 procesora
Auksin amidohidrolaza iz repice – Brassica rapaBrILL2
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Stabilnost oko 10 tjedana 16 procesora, oko 20 ns MD
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BrILL2-IPA_Ala
6 x 20 ns svaki12 x 20 ns
200 000 CPUhOko 4 months on 16 processorsOtprilike 6 radova paralelno
Radius giracije – mjera globularnisti
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Auxin amidohydrolase
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KEMIJSKA REAKCIJA
Mogući mehanizam?
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QM
MM
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About 24 weeks on 64 processors,ca 300 000 CPUh
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• Trenutačno 10+ ljudi (2-3 groups) slične
teme – modeliranje biomakromolekula
• Računalni programi (grupe računalnih
programa koje koristimo/voljeli koristiti na CRO-NGI):
- AMBER
- CHRARMM
- GROMACS (GROMOS)- MACROMODEL
- ACCELERIES (insightII & Discover)
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Korisnička zajednica -
LifeScience
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Incijativa – dobivanje nacionalne licence za programski paket Accelrys
Integrirani skup programa za provođenje računa molekulskog modeliranja i simulacija iz području znanosti o životu i znanosti o materijalima
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Ožujak 2010.
X
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Nacionalna licenca za programski paket Accelrys u Poljskoj (Interdisciplinary centre for mathematical and
computational modelling, University of Warsaw)
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No of processors, n CPU
Fee Equation
1<=n<=6 n*1150 EUR
6<n<10 ((n-5)1/2 +5) *1150 EUR
10<=n 8321 EUR.
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Povezivanje s bazama podataka npr. Discovery Gate
Inicijativa Donatela Verbanec
Ranije unutar Plive
https://www.discoverygate.com/iss/servlet/App?Action=ShowApp