1IQS | pdb_00001iqs

Minimized average structure of MTH1880 from Methanobacterium Thermoautotrophicum

• PDB DOI: https://doi.org/10.2210/pdb1IQS/pdb
• BMRB: 5129

• Classification: METAL BINDING PROTEIN
• Organism(s): Methanothermobacter thermautotrophicus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2001-07-29 Released: 2002-07-29 
• Deposition Author(s): Lee, C.H., Shin, J., Bang, E., Jung, J.W., Yee, A., Arrowsmith, C.H., Lee, W.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 1 
• Conformers Submitted: 1 
• Selection Criteria: This model is the minimized average structure from 20 structures with the lowest energy 

Literature

Solution structure of a novel calcium binding protein, MTH1880, from Methanobacterium thermoautotrophicum.

Lee, C.H., Jung, J.W., Yee, A., Arrowsmith, C.H., Lee, W.

(2004) Protein Sci 13: 1148-1154

• PubMed: 15044740 
• DOI: https://doi.org/10.1110/ps.03472104
• Primary Citation Related Structures: 
  1IQO, 1IQS


• PubMed Abstract: 
  

  MTH1880 is a hypothetical protein from Methanobacterium thermoautotrophicum, a target organism of structural genomics. The solution structure determined by NMR spectroscopy demonstrates a typical alpha + beta-fold found in many proteins with different functions. The molecular surface of the protein reveals a small, highly acidic pocket comprising loop B (Asp36, Asp37, Asp38), the end of beta2 (Glu39), and loop D (Ser57, Ser58, Ser61), indicating that the protein would have a possible cation binding site. The NMR resonances of several amino acids within the acidic binding pocket in MTH1880, shifted upon addition of calcium ion. This calcium binding motif and overall topology of MTH1880 differ from those of other calcium binding proteins. MTH1880 did not show a calcium-induced conformational change typical of calcium sensor proteins. Therefore, we propose that the MTH1880 protein contains a novel motif for calcium-specific binding, and may function as a calcium buffering protein.

---

Organizational Affiliation: 
• Department of Biochemistry, College of Science, Yonsei University, 134 Seodaemoon-Gu, Shinchondong, Seoul, Korea 120-749.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 9.96 kDa 
• Atom Count: 703 
• Modeled Residue Count: 88 
• Deposited Residue Count: 88 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MTH1880	A	88	Methanothermobacter thermautotrophicus	Mutation(s): 1
UniProt
Find proteins for O27908 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)) Explore O27908  Go to UniProtKB:  O27908

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 1 
• Conformers Submitted: 1 
• Selection Criteria: This model is the minimized average structure from 20 structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-07-29 
Deposition Author(s): Lee, C.H., Shin, J., Bang, E., Jung, J.W., Yee, A., Arrowsmith, C.H., Lee, W.

Revision History  

• Version 1.0: 2002-07-29
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-11-10
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2023-12-27
  Changes: Data collection