6CWX

Crystal structure of human ribonuclease P/MRP proteins Rpp20/Rpp25


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of Human Rpp20/Rpp25 Reveals Quaternary Level Adaptation of the Alba Scaffold as Structural Basis for Single-stranded RNA Binding.

Chan, C.W.Kiesel, B.R.Mondragon, A.

(2018) J. Mol. Biol. 430: 1403-1416

  • DOI: 10.1016/j.jmb.2018.03.029

  • PubMed Abstract: 
  • Ribonuclease P (RNase P) catalyzes the removal of 5' leaders of tRNA precursors and its central catalytic RNA subunit is highly conserved across all domains of life. In eukaryotes, RNase P and RNase MRP, a closely related ribonucleoprotein enzyme, sh ...

    Ribonuclease P (RNase P) catalyzes the removal of 5' leaders of tRNA precursors and its central catalytic RNA subunit is highly conserved across all domains of life. In eukaryotes, RNase P and RNase MRP, a closely related ribonucleoprotein enzyme, share several of the same protein subunits, contain a similar catalytic RNA core, and exhibit structural features that do not exist in their bacterial or archaeal counterparts. A unique feature of eukaryotic RNase P/MRP is the presence of two relatively long and unpaired internal loops within the P3 region of their RNA subunit bound by a heterodimeric protein complex, Rpp20/Rpp25. Here we present a crystal structure of the human Rpp20/Rpp25 heterodimer and we propose, using comparative structural analyses, that the evolutionary divergence of the single-stranded and helical nucleic acid binding specificities of eukaryotic Rpp20/Rpp25 and their related archaeal Alba chromatin protein dimers, respectively, originate primarily from quaternary level differences observed in their heterodimerization interface. Our work provides structural insights into how the archaeal Alba protein scaffold was adapted evolutionarily for incorporation into several functionally-independent eukaryotic ribonucleoprotein complexes.


    Organizational Affiliation

    Department of Molecular Biosciences, Northwestern University, 2205 Tech Drive, Evanston, IL 60208-3500, United States. Electronic address: a-mondragon@northwestern.edu.,Department of Molecular Biosciences, Northwestern University, 2205 Tech Drive, Evanston, IL 60208-3500, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease P protein subunit p20
A
142Homo sapiensMutation(s): 0 
Gene Names: POP7 (RPP20)
EC: 3.1.26.5
Find proteins for O75817 (Homo sapiens)
Go to Gene View: POP7
Go to UniProtKB:  O75817
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease P protein subunit p25
B
201Homo sapiensMutation(s): 0 
Gene Names: RPP25
EC: 3.1.26.5
Find proteins for Q9BUL9 (Homo sapiens)
Go to Gene View: RPP25
Go to UniProtKB:  Q9BUL9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FMT
Query on FMT

Download SDF File 
Download CCD File 
A, B
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CME
Query on CME
A, B
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 
  • Space Group: I 4 3 2
Unit Cell:
Length (Å)Angle (°)
a = 182.190α = 90.00
b = 182.190β = 90.00
c = 182.190γ = 90.00
Software Package:
Software NamePurpose
iMOSFLMdata reduction
BUCCANEERmodel building
PDB_EXTRACTdata extraction
REFMACrefinement
autoSHARPphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM058443
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States4T32 GM008152
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States5T32 GM008382

Revision History 

  • Version 1.0: 2018-04-18
    Type: Initial release
  • Version 1.1: 2018-05-23
    Type: Data collection, Database references
  • Version 1.2: 2020-01-01
    Type: Author supporting evidence