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- PDB-8qi7: Cryo-EM Structure of Human Serine Hydroxymethyltransferase, isofo... -

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Basic information

Entry
Database: PDB / ID: 8qi7
TitleCryo-EM Structure of Human Serine Hydroxymethyltransferase, isoform 2 (SHMT2)
ComponentsSerine hydroxymethyltransferase, mitochondrial
KeywordsTRANSFERASE / one-carbon metabolism / folate cycle / tetrahydtofolate / mitochondria
Function / homology
Function and homology information


BRISC complex / L-allo-threonine aldolase activity / regulation of mitochondrial translation / purine nucleobase biosynthetic process / L-serine metabolic process / glycine metabolic process / L-serine biosynthetic process / serine binding / glycine hydroxymethyltransferase / glycine hydroxymethyltransferase activity ...BRISC complex / L-allo-threonine aldolase activity / regulation of mitochondrial translation / purine nucleobase biosynthetic process / L-serine metabolic process / glycine metabolic process / L-serine biosynthetic process / serine binding / glycine hydroxymethyltransferase / glycine hydroxymethyltransferase activity / glycine biosynthetic process from serine / L-serine catabolic process / Metabolism of folate and pterines / regulation of oxidative phosphorylation / tetrahydrofolate metabolic process / response to type I interferon / protein K63-linked deubiquitination / tetrahydrofolate interconversion / regulation of aerobic respiration / mitochondrial nucleoid / folic acid metabolic process / RHOG GTPase cycle / mRNA regulatory element binding translation repressor activity / protein tetramerization / mRNA 5'-UTR binding / microtubule cytoskeleton / pyridoxal phosphate binding / one-carbon metabolic process / protein homotetramerization / mitochondrial inner membrane / mitochondrial matrix / chromatin binding / positive regulation of cell population proliferation / protein homodimerization activity / mitochondrion / extracellular exosome / zinc ion binding / nucleus / cytosol / cytoplasm
Similarity search - Function
Serine hydroxymethyltransferase, pyridoxal phosphate binding site / Serine hydroxymethyltransferase pyridoxal-phosphate attachment site. / Serine hydroxymethyltransferase / Serine hydroxymethyltransferase-like domain / Serine hydroxymethyltransferase / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, major domain / Pyridoxal phosphate-dependent transferase
Similarity search - Domain/homology
Serine hydroxymethyltransferase, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsRutkiewicz, M. / Tran, L.H. / Ruszkowski, M.
Funding support Poland, 1items
OrganizationGrant numberCountry
Other government Poland
Citation
Journal: To Be Published
Title: New Structural Models of SHMT2
Authors: Rutkiewicz, M. / Tran, L.H. / Ruszkowski, M.
#1: Journal: Acta Crystallogr D Struct Biol / Year: 2019
Title: Macromolecular structure determination using X-rays, neutrons and electrons: recent developments in Phenix.
Authors: Dorothee Liebschner / Pavel V Afonine / Matthew L Baker / Gábor Bunkóczi / Vincent B Chen / Tristan I Croll / Bradley Hintze / Li Wei Hung / Swati Jain / Airlie J McCoy / Nigel W Moriarty ...Authors: Dorothee Liebschner / Pavel V Afonine / Matthew L Baker / Gábor Bunkóczi / Vincent B Chen / Tristan I Croll / Bradley Hintze / Li Wei Hung / Swati Jain / Airlie J McCoy / Nigel W Moriarty / Robert D Oeffner / Billy K Poon / Michael G Prisant / Randy J Read / Jane S Richardson / David C Richardson / Massimo D Sammito / Oleg V Sobolev / Duncan H Stockwell / Thomas C Terwilliger / Alexandre G Urzhumtsev / Lizbeth L Videau / Christopher J Williams / Paul D Adams /
Abstract: Diffraction (X-ray, neutron and electron) and electron cryo-microscopy are powerful methods to determine three-dimensional macromolecular structures, which are required to understand biological ...Diffraction (X-ray, neutron and electron) and electron cryo-microscopy are powerful methods to determine three-dimensional macromolecular structures, which are required to understand biological processes and to develop new therapeutics against diseases. The overall structure-solution workflow is similar for these techniques, but nuances exist because the properties of the reduced experimental data are different. Software tools for structure determination should therefore be tailored for each method. Phenix is a comprehensive software package for macromolecular structure determination that handles data from any of these techniques. Tasks performed with Phenix include data-quality assessment, map improvement, model building, the validation/rebuilding/refinement cycle and deposition. Each tool caters to the type of experimental data. The design of Phenix emphasizes the automation of procedures, where possible, to minimize repetitive and time-consuming manual tasks, while default parameters are chosen to encourage best practice. A graphical user interface provides access to many command-line features of Phenix and streamlines the transition between programs, project tracking and re-running of previous tasks.
History
DepositionSep 11, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 20, 2023Provider: repository / Type: Initial release
Revision 1.1Nov 15, 2023Group: Data collection / Category: chem_comp_atom / chem_comp_bond / Item: _chem_comp_atom.atom_id / _chem_comp_bond.atom_id_2

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Serine hydroxymethyltransferase, mitochondrial
D: Serine hydroxymethyltransferase, mitochondrial
B: Serine hydroxymethyltransferase, mitochondrial
C: Serine hydroxymethyltransferase, mitochondrial


Theoretical massNumber of molelcules
Total (without water)211,7804
Polymers211,7804
Non-polymers00
Water2,108117
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-IDDetails
d_1ens_1chain "B"
d_2ens_1chain "A"
d_3ens_1chain "C"
d_4ens_1chain "D"

NCS domain segments:

Component-ID: 1 / Ens-ID: ens_1 / Beg auth comp-ID: TRP / Beg label comp-ID: TRP / End auth comp-ID: HIS / End label comp-ID: HIS / Auth seq-ID: 43 - 504 / Label seq-ID: 15 - 476

Dom-IDAuth asym-IDLabel asym-ID
d_1BC
d_2AA
d_3CD
d_4DB

NCS oper:
IDCodeMatrixVector
1given(0.999999997544, 2.4183522622E-5, 6.57768543375E-5), (2.41888305602E-5, -0.999999996451, -8.06965403269E-5), (6.57749025775E-5, 8.06981311939E-5, -0.999999994581)-0.0124766681872, 258.007528769, 256.25749997
2given(-0.999999911612, 0.000257608215092, -0.000332287281198), (0.000257451379584, 0.999999855494, 0.000471944148384), (0.000332408809871, 0.00047185855885, -0.999999833427)258.012460535, -0.110196193096, 256.159168223
3given(-0.999999996827, -7.15626047232E-5, -3.50035936214E-5), (7.15610136114E-5, -0.999999996406, 4.54548093752E-5), (-3.50068463602E-5, 4.54523043384E-5, 0.999999998354)258.015137459, 257.979319415, 0.000123266492153

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Components

#1: Protein
Serine hydroxymethyltransferase, mitochondrial / / SHMT / Glycine hydroxymethyltransferase / Serine methylase


Mass: 52944.973 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SHMT2 / Plasmid: pMCSG68
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P34897, glycine hydroxymethyltransferase
#2: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 117 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestN

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Experimental details

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Experiment

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

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Sample preparation

ComponentName: SHMT2 in the form of PLP internal aldimineSerine hydroxymethyltransferase
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 7.5 / Details: 25 mM Hepes pH 7.5, 150 mM NaCl, 1 mM TCEP
SpecimenConc.: 0.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277 K

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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: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 3000 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm
Image recordingElectron dose: 40.4 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7948
Image scansWidth: 5760 / Height: 4092

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.0.3particle selection
2EPUimage acquisition
4cryoSPARC4.0.3CTF correction
7Coot0.9.8model fitting
9PHENIX1.2model refinement
10cryoSPARC4.0.3initial Euler assignment
11cryoSPARC4.0.3final Euler assignment
12cryoSPARC4.0.3classification
13cryoSPARC4.0.33D reconstruction
CTF correctionType: NONE
SymmetryPoint symmetry: D2 (2x2 fold dihedral)
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 146577 / Algorithm: FOURIER SPACE / Num. of class averages: 29 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 8aql

8aql


Pdb chain-ID: A / Accession code: 8aql / Source name: PDB / Type: experimental model
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 63.35 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.011214800
ELECTRON MICROSCOPYf_angle_d1.933420024
ELECTRON MICROSCOPYf_chiral_restr0.09482192
ELECTRON MICROSCOPYf_plane_restr0.03112636
ELECTRON MICROSCOPYf_dihedral_angle_d16.56584186
Refine LS restraints NCS
Ens-IDDom-IDAsym-IDAuth asym-IDRefine-IDTypeRms dev position (Å)
ens_1d_2DCELECTRON MICROSCOPYNCS constraints5.01307945896E-13
ens_1d_3DCELECTRON MICROSCOPYNCS constraints5.37248110576E-13
ens_1d_4DCELECTRON MICROSCOPYNCS constraints7.72046952384E-13

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