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- PDB-2qgf: Structure of regulatory chain mutant H20A of asparate transcarbam... -

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Basic information

Entry
Database: PDB / ID: 2qgf
TitleStructure of regulatory chain mutant H20A of asparate transcarbamoylase from E. coli
Components
  • Aspartate carbamoyltransferase catalytic chain
  • Aspartate carbamoyltransferase regulatory chain
KeywordsTRANSFERASE/Transferase regulator / allosteric enzyme regulatory chain mutation / heterotropic regulation / TRANSFERASE-Transferase regulator COMPLEX
Function / homology
Function and homology information


aspartate carbamoyltransferase complex / pyrimidine nucleotide biosynthetic process / aspartate carbamoyltransferase / aspartate carbamoyltransferase activity / glutamine metabolic process / amino acid binding / protein homotrimerization / 'de novo' UMP biosynthetic process / 'de novo' pyrimidine nucleobase biosynthetic process / zinc ion binding ...aspartate carbamoyltransferase complex / pyrimidine nucleotide biosynthetic process / aspartate carbamoyltransferase / aspartate carbamoyltransferase activity / glutamine metabolic process / amino acid binding / protein homotrimerization / 'de novo' UMP biosynthetic process / 'de novo' pyrimidine nucleobase biosynthetic process / zinc ion binding / identical protein binding / cytosol / cytoplasm
Similarity search - Function
Aspartate transcarbamylase regulatory subunit / Aspartate carbamoyltransferase regulatory subunit, C-terminal / Aspartate carbamoyltransferase regulatory subunit, N-terminal / Aspartate carbamoyltransferase regulatory subunit, C-terminal domain superfamily / Aspartate carbamoyltransferase regulatory subunit, N-terminal domain superfamily / Aspartate carbamoyltransferase regulatory chain, allosteric domain / Aspartate carbamoyltransferase regulatory chain, metal binding domain / Aspartate carbamoyltransferase regulatory subunit, N-terminal domain / Aspartate carbamoyltransferase regulatory subunit, C-terminal domain / Aspartate carbamoyltransferase ...Aspartate transcarbamylase regulatory subunit / Aspartate carbamoyltransferase regulatory subunit, C-terminal / Aspartate carbamoyltransferase regulatory subunit, N-terminal / Aspartate carbamoyltransferase regulatory subunit, C-terminal domain superfamily / Aspartate carbamoyltransferase regulatory subunit, N-terminal domain superfamily / Aspartate carbamoyltransferase regulatory chain, allosteric domain / Aspartate carbamoyltransferase regulatory chain, metal binding domain / Aspartate carbamoyltransferase regulatory subunit, N-terminal domain / Aspartate carbamoyltransferase regulatory subunit, C-terminal domain / Aspartate carbamoyltransferase / Aspartate/ornithine carbamoyltransferase / Aspartate and ornithine carbamoyltransferases signature. / Aspartate/ornithine carbamoyltransferase / Aspartate/ornithine carbamoyltransferase, Asp/Orn-binding domain / Aspartate/ornithine carbamoyltransferase, carbamoyl-P binding / Aspartate/ornithine carbamoyltransferase superfamily / Aspartate/ornithine carbamoyltransferase, Asp/Orn binding domain / Aspartate/ornithine carbamoyltransferase, carbamoyl-P binding domain / SH3 type barrels. / Roll / Alpha-Beta Plaits / Rossmann fold / 2-Layer Sandwich / 3-Layer(aba) Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Aspartate carbamoyltransferase catalytic subunit / Aspartate carbamoyltransferase regulatory chain
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.2 Å
AuthorsStec, B. / Williams, M.K. / Stieglitz, K.A. / Kantrowitz, E.R.
CitationJournal: Acta Crystallogr.,Sect.D / Year: 2007
Title: Comparison of two T-state structures of regulatory-chain mutants of Escherichia coli aspartate transcarbamoylase suggests that His20 and Asp19 modulate the response to heterotropic effectors.
Authors: Stec, B. / Williams, M.K. / Stieglitz, K.A. / Kantrowitz, E.R.
History
DepositionJun 28, 2007Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 19, 2008Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.2Oct 20, 2021Group: Database references / Derived calculations / Category: database_2 / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.3Aug 30, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Aspartate carbamoyltransferase catalytic chain
B: Aspartate carbamoyltransferase regulatory chain
C: Aspartate carbamoyltransferase catalytic chain
D: Aspartate carbamoyltransferase regulatory chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)102,9586
Polymers102,8274
Non-polymers1312
Water7,746430
1
A: Aspartate carbamoyltransferase catalytic chain
B: Aspartate carbamoyltransferase regulatory chain
C: Aspartate carbamoyltransferase catalytic chain
D: Aspartate carbamoyltransferase regulatory chain
hetero molecules

A: Aspartate carbamoyltransferase catalytic chain
B: Aspartate carbamoyltransferase regulatory chain
C: Aspartate carbamoyltransferase catalytic chain
D: Aspartate carbamoyltransferase regulatory chain
hetero molecules

A: Aspartate carbamoyltransferase catalytic chain
B: Aspartate carbamoyltransferase regulatory chain
C: Aspartate carbamoyltransferase catalytic chain
D: Aspartate carbamoyltransferase regulatory chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)308,87418
Polymers308,48212
Non-polymers3926
Water21612
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_655-y+1,x-y,z1
crystal symmetry operation3_665-x+y+1,-x+1,z1
Buried area30190 Å2
ΔGint-79 kcal/mol
Surface area107860 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)122.280, 122.280, 142.490
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number150
Space group name H-MP321
Components on special symmetry positions
IDModelComponents
11C-394-

HOH

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Components

#1: Protein Aspartate carbamoyltransferase catalytic chain / Aspartate transcarbamylase / ATCase


Mass: 34337.105 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Strain: EK1104 / Gene: pyrB / Plasmid: pEK121 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A786, aspartate carbamoyltransferase
#2: Protein Aspartate carbamoyltransferase regulatory chain


Mass: 17076.557 Da / Num. of mol.: 2 / Mutation: H20A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: pyrI / Plasmid: pEK121 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A7F3
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 430 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.99 Å3/Da / Density % sol: 58.86 %
Crystal growTemperature: 298 K / Method: microdialysis / pH: 5.7
Details: 0.1M citric acid, pH 5.7, MICRODIALYSIS, temperature 298.0K

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 Å
DetectorType: UCSD MARK II / Detector: AREA DETECTOR / Date: Nov 18, 1996
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.2→35 Å / Num. all: 59318 / Num. obs: 59318 / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.3 % / Rmerge(I) obs: 0.099

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Processing

Software
NameVersionClassification
SDMSdata collection
X-PLORmodel building
X-PLOR3.1refinement
SDMSdata reduction
SDMSdata scaling
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1NBE

1nbe


Resolution: 2.2→35 Å / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflectionSelection details
Rfree0.223 -RANDOM
Rwork0.197 --
all0.197 59318 -
obs-59318 -
Refinement stepCycle: LAST / Resolution: 2.2→35 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms7222 0 2 430 7654
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.014
X-RAY DIFFRACTIONx_angle_deg1.7
X-RAY DIFFRACTIONx_dihedral_angle_d25.7
X-RAY DIFFRACTIONx_improper_angle_d1.6

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