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- PDB-8k10: SID1 transmembrane family member 2 -

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Basic information

Entry
Database: PDB / ID: 8k10
TitleSID1 transmembrane family member 2
ComponentsSID1 transmembrane family member 2
KeywordsTRANSPORT PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM COMPLEX
Function / homology
Function and homology information


nucleic acid transmembrane transporter activity / AP-1 adaptor complex binding / RNA transmembrane transporter activity / AP-2 adaptor complex binding / RNA transport / type B pancreatic cell development / regulation of insulin secretion involved in cellular response to glucose stimulus / type B pancreatic cell proliferation / RNA catabolic process / response to glucose ...nucleic acid transmembrane transporter activity / AP-1 adaptor complex binding / RNA transmembrane transporter activity / AP-2 adaptor complex binding / RNA transport / type B pancreatic cell development / regulation of insulin secretion involved in cellular response to glucose stimulus / type B pancreatic cell proliferation / RNA catabolic process / response to glucose / cell morphogenesis / double-stranded RNA binding / glucose homeostasis / lysosome / lysosomal membrane / DNA binding / plasma membrane
Similarity search - Function
SID1 transmembrane family / dsRNA-gated channel SID-1
Similarity search - Domain/homology
SID1 transmembrane family member 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsGuo, H. / Qi, C. / Lu, Y. / Yang, H. / Zhu, Y. / Sun, F. / Ji, X.
Funding support China, 1items
OrganizationGrant numberCountry
Other government China
CitationJournal: Cell Res / Year: 2024
Title: Cryo-EM structures of human SID-1 transmembrane family proteins and implications for their low-pH-dependent RNA transport activity.
Authors: Le Zheng / Tingting Yang / Hangtian Guo / Chen Qi / Yuchi Lu / Haonan Xiao / Yan Gao / Yue Liu / Yixuan Yang / Mengru Zhou / Henry C Nguyen / Yun Zhu / Fei Sun / Chen-Yu Zhang / Xiaoyun Ji /
History
DepositionJul 10, 2023Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Jul 10, 2024Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: SID1 transmembrane family member 2
B: SID1 transmembrane family member 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)197,57614
Polymers194,1092
Non-polymers3,46712
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein SID1 transmembrane family member 2


Mass: 97054.414 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SIDT2, CGI-40, PSEC0072, UNQ685/PRO1325 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q8NBJ9
#2: 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.: 4
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#3: 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.: 8 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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
Has ligand of interestY

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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: human SID1 transmembrane family member 2 (SIDT2) homodimer
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K

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Electron microscopy imaging

MicroscopyModel: FEI TITAN
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 201729 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0034868
ELECTRON MICROSCOPYf_angle_d0.5656621
ELECTRON MICROSCOPYf_dihedral_angle_d4.331678
ELECTRON MICROSCOPYf_chiral_restr0.042807
ELECTRON MICROSCOPYf_plane_restr0.003815

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