[English] 日本語
Yorodumi
- PDB-6u9h: Arabidopsis thaliana acetohydroxyacid synthase complex -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 6u9h
TitleArabidopsis thaliana acetohydroxyacid synthase complex
Components
  • Acetolactate synthase small subunit 2, chloroplastic
  • Acetolactate synthase, chloroplastic
KeywordsPLANT PROTEIN / Complex
Function / homology
Function and homology information


acetolactate synthase regulator activity / regulation of catalytic activity / acetolactate synthase / acetolactate synthase activity / L-valine biosynthetic process / isoleucine biosynthetic process / thiamine pyrophosphate binding / response to herbicide / chloroplast stroma / chloroplast ...acetolactate synthase regulator activity / regulation of catalytic activity / acetolactate synthase / acetolactate synthase activity / L-valine biosynthetic process / isoleucine biosynthetic process / thiamine pyrophosphate binding / response to herbicide / chloroplast stroma / chloroplast / peroxisome / flavin adenine dinucleotide binding / response to hypoxia / magnesium ion binding
Similarity search - Function
ACT domain / Acetolactate synthase, small subunit, C-terminal / Small subunit of acetolactate synthase / Acetolactate synthase, small subunit / AHAS, ACT domain / : / AHAS small subunit-like ACT domain / ACT-like. Chain A, domain 2 / Acetolactate synthase/Transcription factor NikR, C-terminal / Acetolactate synthase, large subunit, biosynthetic ...ACT domain / Acetolactate synthase, small subunit, C-terminal / Small subunit of acetolactate synthase / Acetolactate synthase, small subunit / AHAS, ACT domain / : / AHAS small subunit-like ACT domain / ACT-like. Chain A, domain 2 / Acetolactate synthase/Transcription factor NikR, C-terminal / Acetolactate synthase, large subunit, biosynthetic / Acetolactate synthase large subunit, TPP binding domain / ACT domain / ACT domain / Thiamine pyrophosphate enzyme / TPP-binding enzyme, conserved site / Thiamine pyrophosphate enzymes signature. / ACT domain profile. / ACT domain / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, N-terminal TPP-binding domain / Thiamine pyrophosphate enzyme, N-terminal TPP binding domain / ACT-like domain / Thiamine pyrophosphate enzyme, C-terminal TPP-binding / Thiamine pyrophosphate enzyme, C-terminal TPP binding domain / Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains / TPP-binding domain / Thiamin diphosphate-binding fold / DHS-like NAD/FAD-binding domain superfamily / Alpha-Beta Plaits / Rossmann fold / 2-Layer Sandwich / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
FLAVIN-ADENINE DINUCLEOTIDE / THIAMINE DIPHOSPHATE / Acetolactate synthase, chloroplastic / Acetolactate synthase small subunit 1, chloroplastic
Similarity search - Component
Biological speciesArabidopsis thaliana (thale cress)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsGuddat, L.W. / Low, Y.S. / Rao, Z.
Funding support Australia, 2items
OrganizationGrant numberCountry
National Health and Medical Research Council (NHMRC, Australia)1087713 Australia
National Health and Medical Research Council (NHMRC, Australia)1147297 Australia
CitationJournal: Nature / Year: 2020
Title: Structures of fungal and plant acetohydroxyacid synthases.
Authors: Thierry Lonhienne / Yu Shang Low / Mario D Garcia / Tristan Croll / Yan Gao / Quan Wang / Lou Brillault / Craig M Williams / James A Fraser / Ross P McGeary / Nicholas P West / Michael J ...Authors: Thierry Lonhienne / Yu Shang Low / Mario D Garcia / Tristan Croll / Yan Gao / Quan Wang / Lou Brillault / Craig M Williams / James A Fraser / Ross P McGeary / Nicholas P West / Michael J Landsberg / Zihe Rao / Gerhard Schenk / Luke W Guddat /
Abstract: Acetohydroxyacid synthase (AHAS), also known as acetolactate synthase, is a flavin adenine dinucleotide-, thiamine diphosphate- and magnesium-dependent enzyme that catalyses the first step in the ...Acetohydroxyacid synthase (AHAS), also known as acetolactate synthase, is a flavin adenine dinucleotide-, thiamine diphosphate- and magnesium-dependent enzyme that catalyses the first step in the biosynthesis of branched-chain amino acids. It is the target for more than 50 commercial herbicides. AHAS requires both catalytic and regulatory subunits for maximal activity and functionality. Here we describe structures of the hexadecameric AHAS complexes of Saccharomyces cerevisiae and dodecameric AHAS complexes of Arabidopsis thaliana. We found that the regulatory subunits of these AHAS complexes form a core to which the catalytic subunit dimers are attached, adopting the shape of a Maltese cross. The structures show how the catalytic and regulatory subunits communicate with each other to provide a pathway for activation and for feedback inhibition by branched-chain amino acids. We also show that the AHAS complex of Mycobacterium tuberculosis adopts a similar structure, thus demonstrating that the overall AHAS architecture is conserved across kingdoms.
History
DepositionSep 8, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 15, 2020Provider: repository / Type: Initial release
Revision 1.1Jan 27, 2021Group: Database references / Derived calculations / Category: citation / citation_author / struct_conn
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id
Revision 1.2Mar 20, 2024Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

-
Structure visualization

Movie
  • Deposited structure unit
  • Imaged by Jmol
  • Download
  • Superimposition on EM map
  • EMDB-20700
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Acetolactate synthase, chloroplastic
B: Acetolactate synthase, chloroplastic
F: Acetolactate synthase small subunit 2, chloroplastic
G: Acetolactate synthase small subunit 2, chloroplastic
H: Acetolactate synthase, chloroplastic
I: Acetolactate synthase, chloroplastic
J: Acetolactate synthase small subunit 2, chloroplastic
K: Acetolactate synthase small subunit 2, chloroplastic
L: Acetolactate synthase, chloroplastic
M: Acetolactate synthase, chloroplastic
N: Acetolactate synthase small subunit 2, chloroplastic
O: Acetolactate synthase small subunit 2, chloroplastic
P: Acetolactate synthase, chloroplastic
Q: Acetolactate synthase, chloroplastic
R: Acetolactate synthase small subunit 2, chloroplastic
S: Acetolactate synthase small subunit 2, chloroplastic
hetero molecules


Theoretical massNumber of molelcules
Total (without water)953,67440
Polymers943,79316
Non-polymers9,88124
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: cross-linking
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

#1: Protein
Acetolactate synthase, chloroplastic / AtALS / Acetohydroxy-acid synthase / Protein CHLORSULFURON RESISTANT 1


Mass: 64025.203 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Arabidopsis thaliana (thale cress) / Gene: ALS, AHAS, CSR1, TZP5, At3g48560, T8P19.70 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: P17597, acetolactate synthase
#2: Protein
Acetolactate synthase small subunit 2, chloroplastic / Acetohydroxy-acid synthase small subunit / ALS


Mass: 53948.906 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Arabidopsis thaliana (thale cress) / Gene: At2g31810, F20M17.15 / Production host: Escherichia coli (E. coli) / References: UniProt: Q93YZ7
#3: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: Mg
#4: Chemical
ChemComp-FAD / FLAVIN-ADENINE DINUCLEOTIDE


Mass: 785.550 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C27H33N9O15P2 / Comment: FAD*YM
#5: Chemical
ChemComp-TPP / THIAMINE DIPHOSPHATE


Mass: 425.314 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C12H19N4O7P2S
Has ligand of interestN

-
Experimental details

-
Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

-
Sample preparation

ComponentName: Acetohydroxyacid synthase quaternary complex / Type: COMPLEX / Details: Recombinant expression from E. coli. / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.72 MDa / Experimental value: NO
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Glutaraldehyde cross linked
Specimen supportGrid material: COPPER
VitrificationCryogen name: ETHANE

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 3.2 sec. / Electron dose: 60 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 2

-
Processing

Software
NameVersionClassification
phenix.real_space_refine1.14_3260refinement
PHENIX1.14_3260refinement
EM software
IDNameVersionCategory
1Gautomatchparticle selection
4GctfCTF correction
11RELION3classification
12RELION33D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 76 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
15K6Q

5k6q

15K6Q1PDBexperimental model
22PC6

2pc6

12PC62PDBexperimental model
RefinementStereochemistry target values: CDL v1.2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.008547284
ELECTRON MICROSCOPYf_angle_d1.086164288
ELECTRON MICROSCOPYf_chiral_restr0.06597316
ELECTRON MICROSCOPYf_plane_restr0.00828328
ELECTRON MICROSCOPYf_dihedral_angle_d9.838736808

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more