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- EMDB-3205: Structure of E.coli Constitutive lysine decarboxylase -

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Basic information

Entry
Database: EMDB / ID: EMD-3205
TitleStructure of E.coli Constitutive lysine decarboxylase
Map dataReconstruction of E.coli Constitutive lysine decarboxylase
Sample
  • Sample: E.coli Constitutive Lysine Decarboxylase
  • Protein or peptide: Constitutive Lysine decarboxylase
Keywordsacid-stress / lysine decarboxylase / RavA / cage
Function / homology
Function and homology information


lysine catabolic process / lysine decarboxylase activity / lysine decarboxylase / identical protein binding / cytoplasm
Similarity search - Function
Orn/Lys/Arg decarboxylase, N-terminal / Ornithine/lysine/arginine decarboxylase / Orn/Lys/Arg decarboxylase, N-terminal / Ornithine/lysine/arginine decarboxylase / Orn/Lys/Arg decarboxylase, N-terminal domain / Orn/Lys/Arg decarboxylases family 1 pyridoxal-P attachment site. / Orn/Lys/Arg decarboxylase, major domain / Orn/Lys/Arg decarboxylase, C-terminal / Orn/Lys/Arg decarboxylase, major domain / Orn/Lys/Arg decarboxylase, C-terminal ...Orn/Lys/Arg decarboxylase, N-terminal / Ornithine/lysine/arginine decarboxylase / Orn/Lys/Arg decarboxylase, N-terminal / Ornithine/lysine/arginine decarboxylase / Orn/Lys/Arg decarboxylase, N-terminal domain / Orn/Lys/Arg decarboxylases family 1 pyridoxal-P attachment site. / Orn/Lys/Arg decarboxylase, major domain / Orn/Lys/Arg decarboxylase, C-terminal / Orn/Lys/Arg decarboxylase, major domain / Orn/Lys/Arg decarboxylase, C-terminal / Orn/Lys/Arg decarboxylase, C-terminal domain superfamily / Orn/Lys/Arg decarboxylase, major domain / Orn/Lys/Arg decarboxylase, C-terminal domain / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, major domain / Pyridoxal phosphate-dependent transferase / Pyridoxal phosphate-dependent transferase, major domain / Pyridoxal phosphate-dependent transferase
Similarity search - Domain/homology
Constitutive lysine decarboxylase
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 6.1 Å
AuthorsKandiah E / Carriel D / Perard J / Malet H / Bacia M / Liu K / Chan WSS / Houry AW / Ollagnier de Choudens S / Elsen S / Gutsche I
CitationJournal: Sci Rep / Year: 2016
Title: Structural insights into the Escherichia coli lysine decarboxylases and molecular determinants of interaction with the AAA+ ATPase RavA.
Authors: Eaazhisai Kandiah / Diego Carriel / Julien Perard / Hélène Malet / Maria Bacia / Kaiyin Liu / Sze W S Chan / Walid A Houry / Sandrine Ollagnier de Choudens / Sylvie Elsen / Irina Gutsche /
Abstract: The inducible lysine decarboxylase LdcI is an important enterobacterial acid stress response enzyme whereas LdcC is its close paralogue thought to play mainly a metabolic role. A unique ...The inducible lysine decarboxylase LdcI is an important enterobacterial acid stress response enzyme whereas LdcC is its close paralogue thought to play mainly a metabolic role. A unique macromolecular cage formed by two decamers of the Escherichia coli LdcI and five hexamers of the AAA+ ATPase RavA was shown to counteract acid stress under starvation. Previously, we proposed a pseudoatomic model of the LdcI-RavA cage based on its cryo-electron microscopy map and crystal structures of an inactive LdcI decamer and a RavA monomer. We now present cryo-electron microscopy 3D reconstructions of the E. coli LdcI and LdcC, and an improved map of the LdcI bound to the LARA domain of RavA, at pH optimal for their enzymatic activity. Comparison with each other and with available structures uncovers differences between LdcI and LdcC explaining why only the acid stress response enzyme is capable of binding RavA. We identify interdomain movements associated with the pH-dependent enzyme activation and with the RavA binding. Multiple sequence alignment coupled to a phylogenetic analysis reveals that certain enterobacteria exert evolutionary pressure on the lysine decarboxylase towards the cage-like assembly with RavA, implying that this complex may have an important function under particular stress conditions.
History
DepositionOct 20, 2015-
Header (metadata) releaseNov 4, 2015-
Map releaseSep 21, 2016-
UpdateSep 21, 2016-
Current statusSep 21, 2016Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5fkz
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_3205.tif

Downloads & links

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Map

FileDownload / File: emd_3205.map.gz / Format: CCP4 / Size: 62.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationReconstruction of E.coli Constitutive lysine decarboxylase
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.19 Å/pix.
x 256 pix.
= 303.616 Å		1.19 Å/pix.
x 256 pix.
= 303.616 Å		1.19 Å/pix.
x 256 pix.
= 303.616 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.186 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.04 / Movie #1: 0.04
Minimum - Maximum-0.06833199 - 0.13725401
Average (Standard dev.)0.0012036 (±0.00779361)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-128-128-128
Dimensions256256256
Spacing256256256
CellA=B=C: 303.616 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.1861.1861.186
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z303.616303.616303.616
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-128-128-128
NC/NR/NS256256256
D min/max/mean-0.0680.1370.001

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Supplemental data

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Sample components

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Entire : E.coli Constitutive Lysine Decarboxylase

EntireName: E.coli Constitutive Lysine Decarboxylase
Components
  • Sample: E.coli Constitutive Lysine Decarboxylase
  • Protein or peptide: Constitutive Lysine decarboxylase

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Supramolecule #1000: E.coli Constitutive Lysine Decarboxylase

SupramoleculeName: E.coli Constitutive Lysine Decarboxylase / type: sample / ID: 1000 / Oligomeric state: Homodecamer / Number unique components: 1
Molecular weightExperimental: 80 KDa / Theoretical: 80 KDa / Method: Size exclusion

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Macromolecule #1: Constitutive Lysine decarboxylase

MacromoleculeName: Constitutive Lysine decarboxylase / type: protein_or_peptide / ID: 1 / Name.synonym: LdcI / Number of copies: 10 / Oligomeric state: Homodecamer / Recombinant expression: Yes
Source (natural)Organism: Escherichia coli K-12 (bacteria) / Strain: K-12 / synonym: E.coli
Molecular weightExperimental: 80 KDa / Theoretical: 80 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli) / Recombinant strain: MG1655
SequenceUniProtKB: Constitutive lysine decarboxylase
GO: cytoplasm, lysine decarboxylase activity, lysine catabolic process
InterPro: Orn/Lys/Arg decarboxylase, N-terminal, Ornithine/lysine/arginine decarboxylase, Orn/Lys/Arg decarboxylase, major domain, Orn/Lys/Arg decarboxylase, C-terminal, Pyridoxal phosphate-dependent ...InterPro: Orn/Lys/Arg decarboxylase, N-terminal, Ornithine/lysine/arginine decarboxylase, Orn/Lys/Arg decarboxylase, major domain, Orn/Lys/Arg decarboxylase, C-terminal, Pyridoxal phosphate-dependent transferase, Pyridoxal phosphate-dependent transferase, major domain, Pyridoxal phosphate-dependent transferase, small domain

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration2 mg/mL
BufferpH: 7.2
Details: 25 mM HEPES, 100 mM NaCl, 0.2 mM PLP, 1 mM DTT, pH 7.2
GridDetails: glow-discharged quantifoil grids 300 mesh 2/1
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 91 K / Instrument: FEI VITROBOT MARK III / Method: Blot for 2.5 seconds before plunging

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Electron microscopy

MicroscopeFEI POLARA 300
TemperatureMin: 90 K / Max: 92 K / Average: 91 K
Alignment procedureLegacy - Electron beam tilt params: 0
DateJul 17, 2014
Image recordingCategory: FILM / Film or detector model: KODAK SO-163 FILM / Digitization - Scanner: ZEISS SCAI / Digitization - Sampling interval: 7 µm / Number real images: 206 / Average electron dose: 25 e/Å2 / Bits/pixel: 8
Tilt angle min0
Tilt angle max0
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated magnification: 59000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2 mm / Nominal defocus max: 4.29 µm / Nominal defocus min: 0.54 µm / Nominal magnification: 59000
Sample stageSpecimen holder: Nitrogen cooled / Specimen holder model: GATAN HELIUM
Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company

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Image processing

DetailsReconstruction was done using RELION v1.3 with full CTF correction.
CTF correctionDetails: each particle; full CTF correction after first peak
Final reconstructionApplied symmetry - Point group: D5 (2x5 fold dihedral) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 6.1 Å / Resolution method: OTHER / Software - Name: RELION / Number images used: 61000
FSC plot (resolution estimation)

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