6J4I

A conserved and buried edge-to-face aromatic interaction in SUMO is vital for the SUMO pathway


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A conserved and buried edge-to-face aromatic interaction in small ubiquitin-like modifier (SUMO) has a role in SUMO stability and function.

Chatterjee, K.S.Tripathi, V.Das, R.

(2019) J.Biol.Chem. 294: 6772-6784

  • DOI: 10.1074/jbc.RA118.006642

  • PubMed Abstract: 
  • Aromatic amino acids buried at a protein's core are often involved in mutual paired interactions. <i>Ab initio </i> energy calculations have highlighted that the conformational orientations and the effects of substitutions are important for stable a ...

    Aromatic amino acids buried at a protein's core are often involved in mutual paired interactions. Ab initio energy calculations have highlighted that the conformational orientations and the effects of substitutions are important for stable aromatic interactions among aromatic rings, but studies in the context of a protein's fold and function are elusive. Small ubiquitin-like modifier (SUMO) is a common post-translational modifier that affects diverse cellular processes. Here, we report that a highly conserved aromatic triad of three amino acids, Phe 36 -Tyr 51 -Phe 64 , is a unique SUMO signature that is absent in other ubiquitin-like homologous folds. We found that a specific edge-to-face conformation between the Tyr 51 -Phe 64 pair of interacting aromatics is vital to the fold and stability of SUMO. Moreover, the noncovalent binding of SUMO-interacting motif (SIM) at the SUMO surface was critically dependent on the paired aromatic interactions buried at the core. NMR structural studies revealed that perturbation of the Tyr 51 -Phe 64 conformation disrupts several long-range tertiary contacts in SUMO, leading to a heterogeneous and dynamic protein with attenuated SUMOylation both in vitro and in cells. A subtle perturbation of the edge-to-face conformation by a Tyr to Phe substitution significantly decreased stability, SUMO/SIM affinity, and the rate of SUMOylation. Our results highlight that absolute co-conservation of specific aromatic pairs inside the SUMO protein core has a role in its stability and function.


    Organizational Affiliation

    From the National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560065, India.,From the National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560065, India rana@ncbs.res.in.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Small ubiquitin-related modifier 1
A
108Homo sapiensMutation(s): 1 
Gene Names: SUMO1 (SMT3C, SMT3H3, UBL1)
Find proteins for P63165 (Homo sapiens)
Go to Gene View: SUMO1
Go to UniProtKB:  P63165
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Department of Biotechnology (India)India--

Revision History 

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2019-03-20
    Type: Data collection, Database references
  • Version 1.2: 2019-05-15
    Type: Data collection, Database references