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Open data
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Basic information
Entry | Database: PDB / ID: 7zvj | ||||||
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Title | Homodimeric structure of LARGE1 | ||||||
![]() | Xylosyl- and glucuronyltransferase LARGE1 | ||||||
![]() | TRANSFERASE / matriglycan / xylose / glucuronic acid / polymerase / TRANSFERASE. | ||||||
Function / homology | ![]() post-embryonic hindlimb morphogenesis / Defective LARGE causes MDDGA6 and MDDGB6 / xylosyltransferase activity / Transferases; Glycosyltransferases / walking behavior / : / principal sensory nucleus of trigeminal nerve development / striated muscle cell development / connective tissue development / skeletal muscle organ development ...post-embryonic hindlimb morphogenesis / Defective LARGE causes MDDGA6 and MDDGB6 / xylosyltransferase activity / Transferases; Glycosyltransferases / walking behavior / : / principal sensory nucleus of trigeminal nerve development / striated muscle cell development / connective tissue development / skeletal muscle organ development / glycosphingolipid biosynthetic process / O-linked glycosylation / glucuronosyltransferase activity / UDP-xylosyltransferase activity / localization of cell / protein O-linked mannosylation / reactive gliosis / glycoprotein biosynthetic process / N-acetylglucosamine metabolic process / neuromuscular process controlling posture / retina layer formation / water transport / plasma membrane organization / acetylglucosaminyltransferase activity / neuromuscular synaptic transmission / retina vasculature development in camera-type eye / basement membrane organization / skeletal muscle fiber differentiation / skeletal muscle tissue regeneration / nerve development / hexosyltransferase activity / dentate gyrus development / protein O-linked glycosylation / astrocyte differentiation / synaptic assembly at neuromuscular junction / cardiac muscle cell development / acetylcholine receptor signaling pathway / protein targeting to membrane / Transferases; Glycosyltransferases; Hexosyltransferases / muscle cell cellular homeostasis / glycosyltransferase activity / blood vessel development / protein glycosylation / macrophage differentiation / Transferases; Glycosyltransferases; Pentosyltransferases / response to light stimulus / behavioral fear response / skeletal muscle fiber development / striated muscle contraction / response to mechanical stimulus / potassium ion transmembrane transport / cytoskeleton organization / myelination / post-translational protein modification / protein localization to plasma membrane / determination of adult lifespan / long-term synaptic potentiation / sensory perception of sound / intracellular protein transport / neuron migration / bone development / neuromuscular junction / multicellular organism growth / memory / manganese ion binding / gene expression / protein-containing complex assembly / Golgi membrane / Golgi apparatus / protein-containing complex / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Diskin, R. / Katz, M. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for matriglycan synthesis by the LARGE1 dual glycosyltransferase. Authors: Michael Katz / Ron Diskin / ![]() Abstract: LARGE1 is a bifunctional glycosyltransferase responsible for generating a long linear polysaccharide termed matriglycan that links the cytoskeleton and the extracellular matrix and is required for ...LARGE1 is a bifunctional glycosyltransferase responsible for generating a long linear polysaccharide termed matriglycan that links the cytoskeleton and the extracellular matrix and is required for proper muscle function. This matriglycan polymer is made with an alternating pattern of xylose and glucuronic acid monomers. Mutations in the LARGE1 gene have been shown to cause life-threatening dystroglycanopathies through the inhibition of matriglycan synthesis. Despite its major role in muscle maintenance, the structure of the LARGE1 enzyme and how it assembles in the Golgi are unknown. Here we present the structure of LARGE1, obtained by a combination of X-ray crystallography and single-particle cryo-EM. We found that LARGE1 homo-dimerizes in a configuration that is dictated by its coiled-coil stem domain. The structure shows that this enzyme has two canonical GT-A folds within each of its catalytic domains. In the context of its dimeric structure, the two types of catalytic domains are brought into close proximity from opposing monomers to allow efficient shuttling of the substrates between the two domains. Together, with putative retention of matriglycan by electrostatic interactions, this dimeric organization offers a possible mechanism for the ability of LARGE1 to synthesize long matriglycan chains. The structural information further reveals the mechanisms in which disease-causing mutations disrupt the activity of LARGE1. Collectively, these data shed light on how matriglycan is synthesized alongside the functional significance of glycosyltransferase oligomerization. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 555.6 KB | Display | ![]() |
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PDB format | ![]() | 409.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 473.8 KB | Display | ![]() |
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Full document | ![]() | 496.1 KB | Display | |
Data in XML | ![]() | 43.1 KB | Display | |
Data in CIF | ![]() | 59.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments:
NCS oper: (Code: givenMatrix: (0.538872024267, -0.00217157415814, 0.842384844194), (0.010962075718, -0.999893926441, -0.00959003453056), (0.842316314907, 0.014402087766, -0.538791059233)Vector: 0. ...NCS oper: (Code: given Matrix: (0.538872024267, -0.00217157415814, 0.842384844194), Vector: |
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Components
#1: Protein | Mass: 72969.930 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: O95461, Transferases; Glycosyltransferases, Transferases; Glycosyltransferases; Pentosyltransferases, Transferases; Glycosyltransferases; Hexosyltransferases #2: Sugar | #3: Chemical | #4: Chemical | #5: Water | ChemComp-HOH / | Has ligand of interest | N | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.91 Å3/Da / Density % sol: 57.8 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop Details: 1.0 M Na3PO4 monobasic monohydrate, K3PO4 dibasic / pH 5.0 20% PEG 200 as cryo preservative |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS EIGER R 4M / Detector: PIXEL / Date: Feb 21, 2021 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9677 Å / Relative weight: 1 |
Reflection | Resolution: 2.61→45.64 Å / Num. obs: 52821 / % possible obs: 96 % / Redundancy: 2.7 % / Biso Wilson estimate: 58.09 Å2 / CC1/2: 0.983 / Net I/σ(I): 4.5 |
Reflection shell | Resolution: 2.61→2.69 Å / Mean I/σ(I) obs: 0.4 / Num. unique obs: 4425 / CC1/2: 0.149 / % possible all: 93 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: EMD-14985 Resolution: 2.61→45.64 Å / SU ML: 0.5557 / Cross valid method: FREE R-VALUE / σ(F): 1.33 / Phase error: 34.7979 Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
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Solvent computation | Shrinkage radii: 1 Å / VDW probe radii: 1.2 Å / Solvent model: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 84.02 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.61→45.64 Å
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Refine LS restraints |
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Refine LS restraints NCS | Type: Torsion NCS / Rms dev position: 1.3231410298 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
LS refinement shell |
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group | Refine-ID: X-RAY DIFFRACTION
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