Did you know ? If you order before Friday 14h we deliver 90PCT of the the time next Tuesday, GENTAUR another in time delivery

Pubmed ID :27224426
Publication Date : //

Elongation Factor Tu Prevents Misediting of Gly-tRNA(Gly) Caused by the Design Behind the Chiral Proofreading Site of D-Aminoacyl-tRNA Deacylase.


D-aminoacyl-tRNA deacylase (DTD) removes D-amino acids mischarged on tRNAs and is thus implicated in enforcing homochirality in proteins. Previously, we proposed that selective capture of D-aminoacyl-tRNA by DTD's invariant, cross-subunit Gly-cisPro motif forms the mechanistic basis for its enantioselectivity. We now show, using nuclear magnetic resonance (NMR) spectroscopy-based binding studies followed by biochemical assays with both bacterial and eukaryotic systems, that DTD effectively misedits Gly-tRNAGly. High-resolution crystal structure reveals that the architecture of DTD's chiral proofreading site is completely porous to achiral glycine. Hence, L-chiral rejection is the only design principle on which DTD functions, unlike other chiral-specific enzymes such as D-amino acid oxidases, which are specific for D-enantiomers. Competition assays with elongation factor thermo unstable (EF-Tu) and DTD demonstrate that EF-Tu precludes Gly-tRNAGly misediting at normal cellular concentrations. However, even slightly higher DTD levels overcome this protection conferred by EF-Tu, thus resulting in significant depletion of Gly-tRNAGly. Our in vitro observations are substantiated by cell-based studies in Escherichia coli that show that overexpression of DTD causes cellular toxicity, which is largely rescued upon glycine supplementation. Furthermore, we provide direct evidence that DTD is an RNA-based catalyst, since it uses only the terminal 2'-OH of tRNA for catalysis without the involvement of protein side chains. The study therefore provides a unique paradigm of enzyme action for substrate selection/specificity by DTD, and thus explains the underlying cause of DTD's activity on Gly-tRNAGly. It also gives a molecular and functional basis for the necessity and the observed tight regulation of DTD levels, thereby preventing cellular toxicity due to misediting.

Authors : Routh Satya Brata , Pawar Komal Ishwar , Ahmad Sadeem , Singh Swati , Suma Katta , Kumar Mantu , Kuncha Santosh Kumar , Yadav Kranthikumar , Kruparani Shobha P , Sankaranarayanan Rajan ,

Related products :

Catalog number Product name Quantity
29-250 CARS is a class 1 aminoacyl-tRNA synthetase, cysteinyl-tRNA synthetase. Each of the twenty aminoacyl-tRNA synthetases catalyzes the aminoacylation of a specific tRNA or tRNA isoaccepting family with t 0.05 mg
29-249 CARS is a class 1 aminoacyl-tRNA synthetase, cysteinyl-tRNA synthetase. Each of the twenty aminoacyl-tRNA synthetases catalyzes the aminoacylation of a specific tRNA or tRNA isoaccepting family with t 0.05 mg
25-598 CARS is a class 1 aminoacyl-tRNA synthetase, cysteinyl-tRNA synthetase. Each of the twenty aminoacyl-tRNA synthetases catalyzes the aminoacylation of a specific tRNA or tRNA isoaccepting family with t 0.05 mg
26-103 Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. EPRS is a multifunctional aminoacyl-tRNA synthetase that catalyzes the aminoacylation of glutamic ac 0.05 mg
25-086 Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. MARS belongs to the class I family of tRNA synthetases.Aminoacyl-tRNA synthetases are a class of enz 0.05 mg
29-313 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.1 mg
29-314 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.05 mg
27-187 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.05 mg
26-106 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.05 mg
30-809 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.05 mg
30-195 Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl- 0.1 mg
EIAAB11992 C20orf88,DTD1,D-tyrosyl-tRNA(Tyr) deacylase 1,HARS2,Histidyl-tRNA synthase-related,Homo sapiens,Human
29-387 Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. FARS2 is a phenylalanine-tRNA synthetase (PheRS) localized to the mitochondrion which consists of a 0.1 mg
29-355 Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. Lysyl-tRNA synthetase is a homodimer localized to the cytoplasm which belongs to the class II family 0.05 mg
EIAAB44057 CCA tRNA nucleotidyltransferase 1, mitochondrial,mitochondrial tRNA nucleotidyl transferase, CCA-adding,Mouse,mt CCA-adding enzyme,mt tRNA adenylyltransferase,mt tRNA CCA-diphosphorylase,mt tRNA CCA-p
EIAAB37799 Eefsec,Elongation factor sec,Eukaryotic elongation factor, selenocysteine-tRNA-specific,Mouse,mSelB,Mus musculus,Selb,Selenocysteine-specific elongation factor
EIAAB37798 EEFSEC,Elongation factor sec,Eukaryotic elongation factor, selenocysteine-tRNA-specific,Homo sapiens,Human,SELB,Selenocysteine-specific elongation factor
EIAAB32694 Homo sapiens,Human,NCRNA00117,PrdX deacylase domain-containing protein 1,PRDXDD1P,Prolyl-tRNA synthetase associated domain-containing protein 1 pseudogene,PRORSD1P,Putative prolyl-tRNA synthetase asso
EIAAB44058 CCA tRNA nucleotidyltransferase 1, mitochondrial,CGI-47,Homo sapiens,Human,Mitochondrial tRNA nucleotidyl transferase, CCA-adding,mt CCA-adding enzyme,mt tRNA adenylyltransferase,mt tRNA CCA-diphospho
REN-671 Recombinant Human D-Tyrosyl-tRNA Deacylase 1 2
enz-671 Recombinant Human D-Tyrosyl-tRNA Deacylase 1 2
enz-671 Recombinant Human D-Tyrosyl-tRNA Deacylase 1 100
enz-671 Recombinant Human D-Tyrosyl-tRNA Deacylase 1 10
E1021r Bovine ELISA Kit FOR D-tyrosyl-tRNA(Tyr) deacylase 1 96T
E5026h Human D_Tyrosyl tRNA Deacylase 1 ELISA Kit 96T


 

GENTAUR Belgium BVBA BE0473327336
Voortstraat 49, 1910 Kampenhout BELGIUM
Tel 0032 16 58 90 45

Fax 0032 16 50 90 45
info@gentaur.com | Gentaur





GENTAUR Ltd.
Howard Frank Turnberry House
1404-1410 High Road
Whetstone London N20 9BH
Tel 020 3393 8531 Fax 020 8445 9411
uk@gentaur.com | Gentaur

 

 




GENTAUR France SARL
9, rue Lagrange, 75005 Paris
Tel 01 43 25 01 50

Fax 01 43 25 01 60
RCS Paris B 484 237 888

SIRET 48423788800017

BNP PARIBAS PARIS PL MAUBERT BIC BNPAFRPPPRG

france@gentaur.com | Gentaur

GENTAUR GmbH
Marienbongard 20
52062 Aachen Deutschland
Support Karolina Elandt
Tel: 0035929830070
Fax: (+49) 241 56 00 47 88

Logistic :0241 40 08 90 86
Bankleitzahl 39050000
IBAN lautet DE8839050000107569353
Handelsregister Aachen HR B 16058
Umsatzsteuer-Identifikationsnummer *** DE 815175831
Steuernummer 201/5961/3925
de@gentaur.com | Gentaur

GENTAUR U.S.A
Genprice Inc, Logistics
547, Yurok Circle
San Jose, CA 95123
CA 95123
Tel (408) 780-0908,
Fax (408) 780-0908,
sales@genprice.com

Genprice Inc, Invoices and accounting
6017 Snell Ave, Ste 357
San Jose, CA 95123




GENTAUR Nederland BV
NL850396268B01 KVK nummer 52327027
Kuiper 1
5521 DG Eersel Nederland
Tel:  0208-080893  Fax: 0497-517897
nl@gentaur.com | Gentaur
IBAN: NL04 RABO 0156 9854 62   SWIFT RABONL2U






GENTAUR Spain
tel:0911876558
spain@gentaur.com | Gentaur






ГЕНТАУЪР БЪЛГАРИЯ
ID # 201 358 931 /BULSTAT
София 1000, ул. "Граф Игнатиев" 53 вх. В, ет. 2
Tel 0035924682280 Fax 0035924808322
e-mail: Sofia@gentaur.com | Gentaur
IBAN: BG11FINV91501014771636
BIC: FINVBGSF

GENTAUR Poland Sp. z o.o.


ul. Grunwaldzka 88/A m.2
81-771 Sopot, Poland
TEL Gdansk 058 710 33 44 FAX  058 710 33 48              

poland@gentaur.com | Gentaur

Other countries

Österreich +43720880899

Canada Montreal +15149077481

Ceská republika Praha +420246019719

Danmark +4569918806

Finland Helsset +358942419041

Magyarország Budapest +3619980547

Ireland Dublin+35316526556

Luxembourg+35220880274

Norge Oslo+4721031366

Sverige Stockholm+46852503438

Schweiz Züri+41435006251

US New York+17185132983

GENTAUR Italy
SRL IVA IT03841300167
Piazza Giacomo Matteotti, 6
24122 Bergamo Tel 02 36 00 65 93
Fax 02 36 00 65 94
italia@gentaur.com | Gentaur