Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 11.05 kDa 
• Atom Count: 707 
• Modelled Residue Count: 90 
• Deposited Residue Count: 97 
• Unique protein chains: 1

5XQM

NMR solution structure of SMO1, Sumo homologue in Caenorhabditis elegans

• PDB DOI: 10.2210/pdb5XQM/pdb
• BMRB: 36096

• Classification: SIGNALING PROTEIN
• Organism(s): Caenorhabditis elegans
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2017-06-07 Released: 2017-11-08 
• Deposition Author(s): Gowda, C.M., Surana, P., Das, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Structural and functional analysis of SMO-1, the SUMO homolog in Caenorhabditis elegans

Surana, P., Gowda, C.M., Tripathi, V., Broday, L., Das, R.

(2017) PLoS One 12: e0186622-e0186622

• PubMed: 29045470 
• DOI: 10.1371/journal.pone.0186622
• Primary Citation of Related Structures:  
  5XQM


• PubMed Abstract: 
  

SUMO proteins are important post-translational modifiers involved in multiple cellular pathways in eukaryotes, especially during the different developmental stages in multicellular organisms. The nematode C. elegans is a well known model system for studying metazoan development and has a single SUMO homolog, SMO-1. Interestingly, SMO-1 modification is linked to embryogenesis and development in the nematode. However, high-resolution information about SMO-1 and the mechanism of its conjugation is lacking. In this work, we report the high-resolution three dimensional structure of SMO-1 solved by NMR spectroscopy. SMO-1 has flexible N-terminal and C-terminal tails on either side of a rigid beta-grasp folded core. While the sequence of SMO-1 is more similar to SUMO1, the electrostatic surface features of SMO-1 resemble more with SUMO2/3. SMO-1 can bind to typical SUMO Interacting Motifs (SIMs). SMO-1 can also conjugate to a typical SUMOylation consensus site as well as to its natural substrate HMR-1. Poly-SMO-1 chains were observed in-vitro even though SMO-1 lacks any consensus SUMOylation site. Typical deSUMOylation enzymes like Senp2 can cleave the poly-SMO-1 chains. Despite being a single gene, the SMO-1 structure allows it to function in a large repertoire of signaling pathways involving SUMO in C. elegans. Structural and functional features of SMO-1 studies described here will be useful to understand its role in development.

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Organizational Affiliation: 

National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Small ubiquitin-related modifier	A	97	Caenorhabditis elegans	Mutation(s): 0  Gene Names: smo-1, smt3, sumo, K12C11.2
UniProt
Find proteins for P55853 (Caenorhabditis elegans) Explore P55853  Go to UniProtKB:  P55853

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 20 
• Selection Criteria: target function 
• OLDERADO: 5XQM Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2017-06-07 
• Released Date: 2017-11-08 
Deposition Author(s): Gowda, C.M., Surana, P., Das, R.

Revision History  

• Version 1.0: 2017-11-08
  Type: Initial release