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- PDB-9avs: Human alpha-galactosidase A in complex with saposin B -

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Basic information

Entry
Database: PDB / ID: 9avs
TitleHuman alpha-galactosidase A in complex with saposin B
Components
  • Alpha-galactosidase A
  • Saposin-B
KeywordsHYDROLASE / Galactosidase / GLA / Saposin / SapB / Fabry disease / Lysosomal / Activator protein
Function / homology
Function and homology information


positive regulation of beta-galactosidase activity / ganglioside GM1 transport to membrane / ganglioside GM2 binding / ganglioside GM3 binding / ganglioside GP1c binding / glycosylceramide catabolic process / ganglioside GM1 binding / negative regulation of nitric-oxide synthase activity / ganglioside GT1b binding / alpha-galactosidase ...positive regulation of beta-galactosidase activity / ganglioside GM1 transport to membrane / ganglioside GM2 binding / ganglioside GM3 binding / ganglioside GP1c binding / glycosylceramide catabolic process / ganglioside GM1 binding / negative regulation of nitric-oxide synthase activity / ganglioside GT1b binding / alpha-galactosidase / alpha-galactosidase activity / glycosphingolipid catabolic process / oligosaccharide metabolic process / glycoside catabolic process / galactoside binding / sphingolipid metabolic process / negative regulation of nitric oxide biosynthetic process / prostate gland growth / epithelial cell differentiation involved in prostate gland development / Glycosphingolipid catabolism / lysosomal transport / azurophil granule membrane / regulation of lipid metabolic process / catalytic activity / enzyme activator activity / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / lysosomal lumen / Peptide ligand-binding receptors / regulation of autophagy / phospholipid binding / azurophil granule lumen / late endosome / Platelet degranulation / G alpha (i) signalling events / scaffold protein binding / collagen-containing extracellular matrix / protease binding / lysosome / hydrolase activity / lysosomal membrane / intracellular membrane-bounded organelle / signaling receptor binding / Neutrophil degranulation / Golgi apparatus / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein binding / plasma membrane / cytoplasm
Similarity search - Function
Saposin, chordata / Alpha galactosidase A, C-terminal beta-sandwich domain / Alpha galactosidase A C-terminal beta sandwich domain / Saposin A-type domain / Saposin / Saposin A-type domain / Saposin A-type domain profile. / Saposin/surfactant protein-B A-type DOMAIN / Saposin-like type B, region 1 / Saposin-like type B, region 1 ...Saposin, chordata / Alpha galactosidase A, C-terminal beta-sandwich domain / Alpha galactosidase A C-terminal beta sandwich domain / Saposin A-type domain / Saposin / Saposin A-type domain / Saposin A-type domain profile. / Saposin/surfactant protein-B A-type DOMAIN / Saposin-like type B, region 1 / Saposin-like type B, region 1 / Saposin B type, region 2 / Alpha galactosidase A / Glycoside hydrolase, family 27 / Saposin-like type B, region 2 / Saposin (B) Domains / Saposin B type domain / Saposin-like / Saposin B type domain profile. / Glycoside hydrolase family 27/36, conserved site / Alpha-galactosidase signature. / Glycosyl hydrolase, all-beta / Aldolase-type TIM barrel / Glycoside hydrolase superfamily
Similarity search - Domain/homology
Alpha-galactosidase A / Prosaposin
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.53 Å
AuthorsSawyer, T.K. / Garman, S.C.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)5R01DK076877 United States
CitationJournal: Biorxiv / Year: 2024
Title: Human Saposin B Ligand Binding and Presentation to alpha-Galactosidase A.
Authors: Sawyer, T.K. / Aral, E. / Staros, J.V. / Bobst, C.E. / Garman, S.C.
History
DepositionMar 4, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 17, 2024Provider: repository / Type: Initial release
Revision 1.1Apr 24, 2024Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Alpha-galactosidase A
B: Alpha-galactosidase A
C: Saposin-B
hetero molecules


Theoretical massNumber of molelcules
Total (without water)108,50417
Polymers103,7863
Non-polymers4,71714
Water1448
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)120.116, 142.563, 191.967
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number20
Space group name H-MC2221
Space group name HallC2c2
Symmetry operation#1: x,y,z
#2: x,-y,-z
#3: -x,y,-z+1/2
#4: -x,-y,z+1/2
#5: x+1/2,y+1/2,z
#6: x+1/2,-y+1/2,-z
#7: -x+1/2,y+1/2,-z+1/2
#8: -x+1/2,-y+1/2,z+1/2

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Components

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Protein , 2 types, 3 molecules ABC

#1: Protein Alpha-galactosidase A / Alpha-D-galactosidase A / Alpha-D-galactoside galactohydrolase / ...Alpha-D-galactosidase A / Alpha-D-galactoside galactohydrolase / Galactosylgalactosylglucosylceramidase GLA / Melibiase


Mass: 47344.465 Da / Num. of mol.: 2 / Mutation: D170A
Source method: isolated from a genetically manipulated source
Details: C-terminal double Flag-tag / Source: (gene. exp.) Homo sapiens (human) / Gene: GLA / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P06280, alpha-galactosidase
#2: Protein Saposin-B / Cerebroside sulfate activator / CSAct / Dispersin / Sphingolipid activator protein 1 / SAP-1 / ...Cerebroside sulfate activator / CSAct / Dispersin / Sphingolipid activator protein 1 / SAP-1 / Sulfatide/GM1 activator


Mass: 9097.452 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Fragment corresponds to residues 195-273 of canonical isoform P07602-1.
Source: (gene. exp.) Homo sapiens (human) / Gene: PSAP, GLBA, SAP1 / Production host: Escherichia coli (E. coli) / References: UniProt: P07602

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Sugars , 5 types, 6 molecules

#3: Polysaccharide alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 894.823 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/4,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a1221m-1a_1-5]/1-1-2-3-4/a4-b1_a6-e1_b4-c1_c3-d1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}[(6+1)][a-L-Fucp]{}}}LINUCSPDB-CARE
#4: Polysaccharide alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 748.682 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,4,3/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3/a4-b1_b4-c1_c3-d1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#5: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#6: Polysaccharide alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3/a4-b1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#8: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 2 types, 16 molecules

#7: Chemical
ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: SO4
#9: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 8 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN

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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: 4.18 Å3/Da / Density % sol: 70.59 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 8
Details: 500 nL of protein (0.1 mM GLA plus 0.22 mM SapB) was mixed with 500 nL of reservoir solution (0.1 mM Tris pH 8.0, 1 M Ammonium sulfate) and equilibrated against 70 uL reservoirs at 20 C.

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-2 / Wavelength: 0.97946 Å
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Nov 24, 2019
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97946 Å / Relative weight: 1
ReflectionResolution: 3.53→57.23 Å / Num. obs: 20451 / % possible obs: 99 % / Redundancy: 12.9 % / Biso Wilson estimate: 90.16 Å2 / CC1/2: 0.997 / Rmerge(I) obs: 0.237 / Net I/σ(I): 7.12
Reflection shellResolution: 3.53→3.656 Å / Rmerge(I) obs: 1.057 / Mean I/σ(I) obs: 1.2 / Num. unique obs: 2023 / CC1/2: 0.903 / % possible all: 99.8

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Processing

Software
NameVersionClassification
PHASERphasing
PHENIX1.20.1-4487refinement
xia2data reduction
xia2data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 3.53→57.23 Å / SU ML: 0.4674 / Cross valid method: FREE R-VALUE / σ(F): 1.35 / Phase error: 28.9381
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflection
Rfree0.2648 1009 4.94 %
Rwork0.2406 19414 -
obs0.2417 20423 99.04 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.1 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 95.49 Å2
Refinement stepCycle: LAST / Resolution: 3.53→57.23 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6848 0 303 8 7159
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0047324
X-RAY DIFFRACTIONf_angle_d0.7259956
X-RAY DIFFRACTIONf_chiral_restr0.04861106
X-RAY DIFFRACTIONf_plane_restr0.00611254
X-RAY DIFFRACTIONf_dihedral_angle_d6.95211098
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
3.53-3.720.32261500.30182760X-RAY DIFFRACTION99.83
3.72-3.950.34571580.29072716X-RAY DIFFRACTION99.52
3.95-4.250.27771470.25392714X-RAY DIFFRACTION97.98
4.25-4.680.21681340.22282768X-RAY DIFFRACTION99.66
4.68-5.360.2891420.23512787X-RAY DIFFRACTION99.8
5.36-6.750.24761290.24892785X-RAY DIFFRACTION98.18
6.75-57.230.23021490.20912884X-RAY DIFFRACTION98.38

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