7LHX

Human U1A protein with F37M and F77M mutations for improved phasing

• PDB DOI: https://doi.org/10.2210/pdb7LHX/pdb

• Classification: RNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2021-01-26 Released: 2021-03-17 
• Deposition Author(s): Jenkins, J.L., Lippa, G.M., Wedekind, J.E.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.213 
• R-Value Work: 0.166 
• R-Value Observed: 0.168 

Starting Model: experimental

Literature

Affinity and Structural Analysis of the U1A RNA Recognition Motif with Engineered Methionines to Improve Experimental Phasing

Srivastava, K.Y., Bonn-Breach, R.B., Chavali, S.S., Lippa, G.M., Jenkins, J.L., Wedekind, J.E.

(2021) Crystals (Basel) 11: 273

• DOI: https://doi.org/10.3390/cryst11030273

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 11.86 kDa 
• Atom Count: 876 
• Modelled Residue Count: 96 
• Deposited Residue Count: 98 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
U1 small nuclear ribonucleoprotein A	A	98	Homo sapiens	Mutation(s): 4  Gene Names: SNRPA
UniProt & NIH Common Fund Data Resources
Find proteins for P09012 (Homo sapiens) Explore P09012  Go to UniProtKB:  P09012
PHAROS:  P09012 GTEx:  ENSG00000077312

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BME	D [auth A]	BETA-MERCAPTOETHANOL C2 H6 O S DGVVWUTYPXICAM-UHFFFAOYSA-N
ACT	C [auth A], E [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
NA	B [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.213 
• R-Value Work: 0.166 
• R-Value Observed: 0.168 
• Space Group: P 3 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.377	α = 90
b = 64.377	β = 90
c = 46.828	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
PROTEUM PLUS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-03-17 
Deposition Author(s): Jenkins, J.L., Lippa, G.M., Wedekind, J.E.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM63162-14
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI150463

Revision History  

• Version 1.0: 2021-03-17
  Type: Initial release
  
• Version 1.1: 2023-10-18
  Changes: Data collection, Database references, Refinement description
• Version 1.2: 2023-11-15
  Changes: Data collection