[English] 日本語
Yorodumi
- PDB-8tdv: ssRNA bound SAMHD1 T closed -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8tdv
TitlessRNA bound SAMHD1 T closed
Components
  • Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
  • RNA (5'-R(P*CP*CP*GP*AP*CP*CP*C)-3')
  • RNA (5'-R(P*CP*CP*GP*GP*CP*C)-3')
KeywordsHYDROLASE / Deoxynucleoside triphosphate triphosphohydrolase
Function / homology
Function and homology information


Nucleotide catabolism / Hydrolases; Acting on ester bonds; Triphosphoric-monoester hydrolases / deoxynucleoside triphosphate hydrolase activity / dGTP binding / triphosphoric monoester hydrolase activity / dATP catabolic process / dGTPase activity / tetraspanin-enriched microdomain / dGTP catabolic process / DNA strand resection involved in replication fork processing ...Nucleotide catabolism / Hydrolases; Acting on ester bonds; Triphosphoric-monoester hydrolases / deoxynucleoside triphosphate hydrolase activity / dGTP binding / triphosphoric monoester hydrolase activity / dATP catabolic process / dGTPase activity / tetraspanin-enriched microdomain / dGTP catabolic process / DNA strand resection involved in replication fork processing / deoxyribonucleotide catabolic process / regulation of innate immune response / negative regulation of type I interferon-mediated signaling pathway / somatic hypermutation of immunoglobulin genes / RNA nuclease activity / double-strand break repair via homologous recombination / Interferon alpha/beta signaling / single-stranded DNA binding / site of double-strand break / protein homotetramerization / defense response to virus / nucleic acid binding / immune response / innate immune response / DNA damage response / GTP binding / RNA binding / zinc ion binding / nucleoplasm / identical protein binding / nucleus / plasma membrane
Similarity search - Function
HD domain profile. / HD domain / HD domain / SAM domain (Sterile alpha motif) / SAM domain profile. / Metal dependent phosphohydrolases with conserved 'HD' motif. / Sterile alpha motif. / HD/PDEase domain / Sterile alpha motif domain / Sterile alpha motif/pointed domain superfamily
Similarity search - Domain/homology
: / RNA / Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
Similarity search - Component
Biological speciesHomo sapiens (human)
Virus-associated RNAs
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.44 Å
AuthorsSung, M. / Huynh, K. / Han, S.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nucleic Acids Res / Year: 2023
Title: Guanine-containing ssDNA and RNA induce dimeric and tetrameric structural forms of SAMHD1.
Authors: Benjamin Orris / Min Woo Sung / Shridhar Bhat / Yingrong Xu / Kevin W Huynh / Seungil Han / Darren C Johnson / Benedikt Bosbach / David J Shields / James T Stivers /
Abstract: The dNTPase activity of tetrameric SAM and HD domain containing deoxynucleoside triphosphate triphosphohydrolase 1 (SAMHD1) plays a critical role in cellular dNTP regulation. SAMHD1 also associates ...The dNTPase activity of tetrameric SAM and HD domain containing deoxynucleoside triphosphate triphosphohydrolase 1 (SAMHD1) plays a critical role in cellular dNTP regulation. SAMHD1 also associates with stalled DNA replication forks, DNA repair foci, ssRNA and telomeres. The above functions require nucleic acid binding by SAMHD1, which may be modulated by its oligomeric state. Here we establish in cryo-EM and biochemical studies that the guanine-specific A1 activator site of each SAMHD1 monomer is used to target the enzyme to guanine nucleotides within single-stranded (ss) DNA and RNA. Remarkably, nucleic acid strands containing a single guanine base induce dimeric SAMHD1, while two or more guanines with ∼20 nucleotide spacing induce a tetrameric form. A cryo-EM structure of ssRNA-bound tetrameric SAMHD1 shows how ssRNA strands bridge two SAMHD1 dimers and stabilize the structure. This ssRNA-bound tetramer is inactive with respect to dNTPase and RNase activity.
History
DepositionJul 5, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 20, 2023Provider: repository / Type: Initial release

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
B: Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
E: Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
F: Deoxynucleoside triphosphate triphosphohydrolase SAMHD1
J: RNA (5'-R(P*CP*CP*GP*GP*CP*C)-3')
K: RNA (5'-R(P*CP*CP*GP*AP*CP*CP*C)-3')
hetero molecules


Theoretical massNumber of molelcules
Total (without water)293,3558
Polymers293,2436
Non-polymers1122
Water0
1


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

-
Components

#1: Protein
Deoxynucleoside triphosphate triphosphohydrolase SAMHD1 / dNTPase / Dendritic cell-derived IFNG-induced protein / DCIP / Monocyte protein 5 / MOP-5 / SAM ...dNTPase / Dendritic cell-derived IFNG-induced protein / DCIP / Monocyte protein 5 / MOP-5 / SAM domain and HD domain-containing protein 1 / hSAMHD1


Mass: 72305.414 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SAMHD1, MOP5 / Production host: Escherichia coli (E. coli)
References: UniProt: Q9Y3Z3, Hydrolases; Acting on ester bonds; Triphosphoric-monoester hydrolases
#2: RNA chain RNA (5'-R(P*CP*CP*GP*GP*CP*C)-3')


Mass: 1866.181 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Virus-associated RNAs
#3: RNA chain RNA (5'-R(P*CP*CP*GP*AP*CP*CP*C)-3')


Mass: 2155.363 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Virus-associated RNAs
#4: Chemical ChemComp-FE / FE (III) ION / Iron


Mass: 55.845 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe
Has ligand of interestN

-
Experimental details

-
Experiment

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

-
Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1ssRNA bound SAMHD1 T closedCOMPLEX#1-#30MULTIPLE SOURCES
2Deoxynucleoside triphosphate triphosphohydrolase SAMHD1COMPLEX#11RECOMBINANT
3RNACOMPLEX#2-#31SYNTHETIC
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

-
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: 2400 nm / Nominal defocus min: 600 nm / Cs: 2.7 mm
Image recordingElectron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

-
Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.44 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 343857 / Symmetry type: POINT

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more