1ivh

From Proteopedia

(Difference between revisions)

Current revision

STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY

Structural highlights

1ivh is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.6Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

IVD_HUMAN Defects in IVD are the cause of isovaleric acidemia (IVA) [MIM:243500. IVA is characterized by retarded psychomotor development, a peculiar odor resembling sweaty feet, an aversion to dietary protein, and pernicious vomiting, leading to acidosis and coma. The acute neonatal form leads to massive metabolic acidosis from the first days of life and rapid death.^[1] ^[2]

Function

IVD_HUMAN

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Isovaleryl-CoA dehydrogenase (IVD) belongs to an important flavoprotein family of acyl-CoA dehydrogenases that catalyze the alpha,beta-dehydrogenation of their various thioester substrates. Although enzymes from this family share similar sequences, catalytic mechanisms, and structural properties, the position of the catalytic base in the primary sequence is not conserved. E376 has been confirmed to be the catalytic base in medium-chain (MCAD) and short-chain acyl-CoA dehydrogenases and is conserved in all members of the acyl-CoA dehydrogenase family except for IVD and long-chain acyl-CoA dehydrogenase. To understand this dichotomy and to gain a better understanding of the factors important in determining substrate specificity in this enzyme family, the three-dimensional structure of human IVD has been determined. Human IVD expressed in Escherichia coli crystallizes in the orthorhombic space group P212121 with unit cell parameters a = 94.0 A, b = 97.7 A, and c = 181.7 A. The structure of IVD was solved at 2.6 A resolution by the molecular replacement method and was refined to an R-factor of 20.7% with an Rfree of 28.8%. The overall polypeptide fold of IVD is similar to that of other members of this family for which structural data are available. The tightly bound ligand found in the active site of the structure of IVD is consistent with that of CoA persulfide. The identity of the catalytic base was confirmed to be E254, in agreement with previous molecular modeling and mutagenesis studies. The location of the catalytic residue together with a glycine at position 374, which is a tyrosine in all other members of the acyl-CoA dehydrogenase family, is important for conferring branched-chain substrate specificity to IVD.

Structure of human isovaleryl-CoA dehydrogenase at 2.6 A resolution: structural basis for substrate specificity,.,Tiffany KA, Roberts DL, Wang M, Paschke R, Mohsen AW, Vockley J, Kim JJ Biochemistry. 1997 Jul 15;36(28):8455-64. PMID:9214289^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Vockley J, Parimoo B, Tanaka K. Molecular characterization of four different classes of mutations in the isovaleryl-CoA dehydrogenase gene responsible for isovaleric acidemia. Am J Hum Genet. 1991 Jul;49(1):147-57. PMID:2063866
↑ Mohsen AW, Anderson BD, Volchenboum SL, Battaile KP, Tiffany K, Roberts D, Kim JJ, Vockley J. Characterization of molecular defects in isovaleryl-CoA dehydrogenase in patients with isovaleric acidemia. Biochemistry. 1998 Jul 14;37(28):10325-35. PMID:9665741 doi:10.1021/bi973096r
↑ Tiffany KA, Roberts DL, Wang M, Paschke R, Mohsen AW, Vockley J, Kim JJ. Structure of human isovaleryl-CoA dehydrogenase at 2.6 A resolution: structural basis for substrate specificity,. Biochemistry. 1997 Jul 15;36(28):8455-64. PMID:9214289 doi:http://dx.doi.org/10.1021/bi970422u

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ivh"

@@ Line 17: / Line 17: @@
   <jmolCheckbox>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/iv/1ivh_consurf.spt"</scriptWhenChecked>
-    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
 </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ivh ConSurf].
 <div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Isovaleryl-CoA dehydrogenase (IVD) belongs to an important flavoprotein family of acyl-CoA dehydrogenases that catalyze the alpha,beta-dehydrogenation of their various thioester substrates. Although enzymes from this family share similar sequences, catalytic mechanisms, and structural properties, the position of the catalytic base in the primary sequence is not conserved. E376 has been confirmed to be the catalytic base in medium-chain (MCAD) and short-chain acyl-CoA dehydrogenases and is conserved in all members of the acyl-CoA dehydrogenase family except for IVD and long-chain acyl-CoA dehydrogenase. To understand this dichotomy and to gain a better understanding of the factors important in determining substrate specificity in this enzyme family, the three-dimensional structure of human IVD has been determined. Human IVD expressed in Escherichia coli crystallizes in the orthorhombic space group P212121 with unit cell parameters a = 94.0 A, b = 97.7 A, and c = 181.7 A. The structure of IVD was solved at 2.6 A resolution by the molecular replacement method and was refined to an R-factor of 20.7% with an Rfree of 28.8%. The overall polypeptide fold of IVD is similar to that of other members of this family for which structural data are available. The tightly bound ligand found in the active site of the structure of IVD is consistent with that of CoA persulfide. The identity of the catalytic base was confirmed to be E254, in agreement with previous molecular modeling and mutagenesis studies. The location of the catalytic residue together with a glycine at position 374, which is a tyrosine in all other members of the acyl-CoA dehydrogenase family, is important for conferring branched-chain substrate specificity to IVD.
+Structure of human isovaleryl-CoA dehydrogenase at 2.6 A resolution: structural basis for substrate specificity,.,Tiffany KA, Roberts DL, Wang M, Paschke R, Mohsen AW, Vockley J, Kim JJ Biochemistry. 1997 Jul 15;36(28):8455-64. PMID:9214289<ref>PMID:9214289</ref>
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+</div>
+<div class="pdbe-citations 1ivh" style="background-color:#fffaf0;"></div>
 ==See Also==

1ivh

From Proteopedia

Current revision

STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox