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! 11 "! # 2013 $ % &'()* ChineseJournalofBioinformatics Vol.11No.2 Jun. 2013 !"#$2012-08-22 %&#$2012-09-07. '()*²-D51267Q20081411 8²K"M*m³DX126720062016 \=>-.´µ¶Email Liuzg77@yahoo.com.cn doi 103969/j.issn.1672-5565.2013.02.10 mcn'8 9~_m ´µ¶· ¸F £¹ º ²K"M*&'KQ*R² » 430068 F G;12zy&{y pACY1 ZztKTSzE[z|c3 12zy  50 I¡¢zPROCHECKlT¤¥Gz tK¦§z A1 B1 E[ z|¨^_z B1 ©ª«5¬PROCHECK ProSa i- WHATIF ®l¨¯°z B1 ±²3 ¦§&³q-´, pACY1 &ZL`µ¶·¸¹º-HIJq-´, 12zytKE[z| KLDMNQ518.2  OPQR?A  OS>N1672-5565 2013 -02-130-06 Constructionandevaluationofathreedimensional structureofporcineaminoacylase LIUZhigang DENGBei YANGBo HUZheng CollegeofBiotechnology HubeiUniversityofTechnology Wuhan 430068 China Abstract Athree-dimensionalstructureofporcineAminoacylaseI pACY1 wasconstructedbyhomologymodel ling.Themodelsafterenergyminizationwereundertheproceduresofmoleculardynamics MD simulationand rationalevaluation.50modelswerebuildedbyhomologymodelling.Amongthemthebesttwomodels modelA werechoosedbyPROCHECKandwerefutherrefinedbyenergyminization.Therefinedmodelsweresignedas modelA1andmodelB1frommodelAandmodelBrespectively.ModelB1hasthebetterstablitiythanmodelA1 duringMDsimulation.TheevaluationsillustratedmodelB1wasareasonablestructurebyPROCHECK ProSaand WHATIF.Wegetareasonable3DstrucureofpACY1 whichcouldbefurtherappliedtostudytherelationbetween structureandfunctionofpACY1. Keywords Aminoacylase1 HomologyModeling EnergyMinization MolecularDynamicsSimulation á1¼åVAminoacylaseI EC3.5.1.14 ACY1 ëì½åè[ N- ¼1 -L- á1âL- á1âu&äÕcabW¾¿ãÀôá1 âÅÄÁz&\¥¦ 1-4 -ºXÂà ÄÅ|WACY1 1Ò{VZÆ{ ÇÑG\ 5-7 ACY1 -?*V M20 12WX »r Zn 2+ \ S Ð È eßàÉ á1 ¼ åV PorcineaminoacylaseI pACY1 c¦?á1â\` ÊÖc\Ë»Ì1 406 »á1â8Ë» Zn 2+ ã¯Zn 2+ W pACY1 è[OVW\ǹ©ª «abÍ'Îië©? Zn 2+ Øïðè[¥¦s WX©ª«abÏÐÑÒ<ÓëìÔú \¥¦ 8-9 vÕd¤ pACY1 \ëì()XÕÝ ÏÐ\ÕÄ ACY1 \½åÖ1997 $Zhao nÍÎÉá1¼åV\ ¡e 10 Ãk[ó\ëì2003 $Lindner Í Î½¶á1¼åVhACY1 T347Geq Â\¡eëìÈeëì+û¯¡e²³×Ñ ½¹ÑwÏë©ëì+\ëì 11 ëì¢ Zn 2+ ë©X»ØáâÖ/¹ú±Ù ¾Èeëì+T\XÂá1â61ÜV\ ÄÍ©4£¤ 11 ÚµÉ8¶á

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Page 1: m„c“”‘n’’‚8 I9~ m - All Journals

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ConstructionandevaluationofathreedimensionalstructureofporcineaminoacylaseⅠLIUZhigang,DENGBei,YANGBo,HUZheng

(CollegeofBiotechnology,HubeiUniversityofTechnology,Wuhan430068,China)

Abstract:Athree-dimensionalstructureofporcineAminoacylaseI(pACY1)wasconstructedbyhomologymodelling.Themodelsafterenergyminizationwereundertheproceduresofmoleculardynamics(MD)simulationandrationalevaluation.50modelswerebuildedbyhomologymodelling.Amongthemthebesttwomodels(modelA,B)werechoosedbyPROCHECKandwerefutherrefinedbyenergyminization.TherefinedmodelsweresignedasmodelA1andmodelB1frommodelAandmodelBrespectively.ModelB1hasthebetterstablitiythanmodelA1duringMDsimulation.TheevaluationsillustratedmodelB1wasareasonablestructurebyPROCHECK,ProSaandWHATIF.Wegetareasonable3DstrucureofpACY1,whichcouldbefurtherappliedtostudytherelationbetweenstructureandfunctionofpACY1.Keywords:Aminoacylase1;HomologyModeling;EnergyMinization;MolecularDynamicsSimulation

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Fig1 SequencealignmentofpACY1,T347GmutantofhACY1(1Q7L),mnDAPE(1VGY)producedbyCLUSTALW

1Q7LrepresentsthechainsA,BandC,D.1VGYrepresentsthechainsA,B.Thedeletedsequencesin1Q7Lareindicatedinitalics

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Page 5: m„c“”‘n’’‚8 I9~ m - All Journals

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Notes:ThebackboneofModelB1iscoloredbysecondarystructure,Thezincionisrepresentedastheredsphere.

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(References)[1] Mitta,M.,Kato,I.,Tsunasawa,S.Themucleotidesequenceof

humanaminoacylase1[J].BiochimicaetBiophysicaActa,

1993,1174:201203.

[2] Tsunasawa,S.Doesuncontrolledsurvivalofacetylatedpeptides

leadtocellproliferation?DeletionofNterminaldeacetylatingsys

temforprotein/peptideinsmalllungcarcinomacells[J].J.

Lab.Clin.Med.,1992,120:505506.

[3]  Scaloni,A.,Jones,W.M.,Pospischil,M.,Sassa,S.,

Schneewind,O.,Popowicz,AM.,Bossa,F.,Graziano,SL.,

Manning,JM.Deficiencyofacylpeptidehydrolaseinsmallcell

lungcarcinomacelllines[J].J.Lab.Clin.Med.,1992,

120:546552.

[4] Maceyka,M.,Nava,V.E.,Milstien,S.,Spiegel,S.Amino

acylase1isasphingosinekinase1interactingprotein[J].FEBS

Letters,2004,568:3034.

[5] Sass,J.O.,Olbrich,H.,Mohr,V.O.,Hart,C.,Woldseth,

B.,Krywawych,S.,Bjurulf,B.,Lakhani,PK.,Buchdahl,

RM.,Omran.H.Neurologicalfindingsinaminoacylase1defi

ciency[J].Neurology,2007,68:21512153.

[6] TylkiSzymanska,A.,Gradowska,W.,Sommer,A.,Heer,

A.,Walter,M.,Reinhard,C.,Omran,H.,Sass,JO.,Ju

recka,A.Aminoacylase1deficiencyassociatedwithautisticbe

havior[J].JInheritMetabDis.,2010,33:14

[7] Sommer,A.,Christensen,E.,Schwenger,S.,Seul,R.,

Haas,D.,Olbrich,H.,Omran,H.,Sass,JO.Themolecular

basisofaminoacylase1deficiency[J].BiochimicaetBiophysica

Acta,2011,1812:685690.

[8] Heese,D.,Berger,S.,RhmK.H.Nuclearmagneticrelaxation

studiesoftheroleofthemetalioninM2+n subtitutedaminoacylase

1[J].Eur.J.Biochem.,1990,188:175180.

[9] Tang,Z.Y.,Yu,J.Y.,Zhou,Q.,He,B.,Wang,ZF.,

Zhou,HM.Secondarystructureofholoandapoaminoacylase

frompredication,circulardichroism,andftramanspectroscopy

[J].J.Biochem.,1995,118:706709.

[10] Zhao,HY.,Meng,WY.,Lin,ZJ.,ZhouHM.Crystallization

andpreliminaryXraystudiesofporcinekidneyaminoacylase1

[J].ChineseScienceBulletin,1997,42:17501752.

[11] Lindner,H.,Lunin,V.V.,Alary,A.,Hecker,R.,Cygler,

M.,Ménard,R.Essentialrolesofzincligationandenzymedim

erizationforcatalysisintheaminoacylase1/M20family[J].J.

Biol.Chem.,2003,278:4449644504.

[12] Lindner,H.,Alary,A.,Wilke,M.,Sulea,T.Probingthe

AcylBindingPocketofAminoacylase1[J].Biochemistry,

2008,47:42664275.

[13] Larkin,MA.,Blackshields,G.,Brown,NP.,Chenna,R.,

McGettigan,PA.,McWilliam,H.,Valentin,F.,Wallace,

IM.,Wilm,A.,Lopez,R.,Thompson,JD.,Gibson,TJ.,

Higgins,DG.ClustalWandClustalXversion2.0[J].Bioin

formatics,2007,23(21):29472948.

[14] Kelley,LA.,Sternberg,MJE.Proteinstructurepredictionon

theweb:acasestudyusingthePhyreserver[J].NatureProto

cols,2009,4:363371.

[15] Laskowski,RA.,MacArthur,MW.,Moss,DS.,Thornton,

431!

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 #

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11'

Page 6: m„c“”‘n’’‚8 I9~ m - All Journals

JM.PROCHECK:aprogramtocheckthestereochemicalquality

ofproteinstructures[J].J.App.Cryst.,1993,26:283291.

[16] Wang,J.,Cieplak,P.,Kollman,PA.Howwelldoesare

strainedelectrostaticpotential(RESP)modelperformincalcu

latingconformationalenergiesoforganicandbiologicalmole

cules?[J].J.Comput.Chem.,2000,21:10491074.

[17] Pang,Y.P.,Xu,K.,Yazal,JE.,Prendergas,FG.Successful

moleculardynamicssimulationofthezincboundfarnesyltrans

feraseusingthecationicdummyatomapproach[J].ProteinSci

ence,2000,9:18571865.

[18] Wiederstein,M.,Sippl,MJ.ProSAweb:interactivewebserv

icefortherecognitionoferrorsinthreedimensionalstructuresof

proteins[J].NucleicAcidsResearch,2007,35:W407W410.

[19] Vriend,G.Amolecularmodelinganddrugdesignprogram[J].

J.Mol.Graph.,1990,8:5256.

[20] Pittelkow,S.,Lindner,H.,Rhm,KH.Humanandporcine

aminoacylase1overproducedinabaculovirusexpressionvector

system:evidenceforstructuralandfunctionalidentitywithen

zymesisolatedfromkidney[J].ProteinExpr.Purif.,1998,

12:269276.

[21] Biagini,A.,Puigserver,A.Sequenceanalysisoftheaminoacy

lase1family.Anewproposedsignatureformetalloexopeptidases

[J].Comp.Biochem.Physiol.PartB,2001,128:469481.

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