Macromolecule Content

• Total Structure Weight: 23.49 kDa 
• Atom Count: 1638 
• Modelled Residue Count: 202 
• Deposited Residue Count: 202 
• Unique protein chains: 1

1M31

Three-Dimensional Solution Structure of Apo-Mts1

• DOI: 10.2210/pdb1M31/pdb
• BMRB: 4892

• Classification: METAL BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2002-06-26 Released: 2002-10-30 
• Deposition Author(s): Vallely, K.M., Rustandi, R.R., Ellis, K.C., Varlamova, O., Bresnick, A.R., Weber, D.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

Solution structure of human Mts1 (S100A4) as determined by NMR spectroscopy.

Vallely, K.M., Rustandi, R.R., Ellis, K.C., Varlamova, O., Bresnick, A.R., Weber, D.J.

(2002) Biochemistry 41: 12670-12680

• PubMed: 12379109 
• DOI: 10.1021/bi020365r
• Primary Citation of Related Structures:  
  1M31


• PubMed Abstract: 
  

Mts1 is a member of the S100 family of Ca2+-binding proteins and is implicated in promoting tumor progression and metastasis. To better understand the structure-function relationships of this protein and to begin characterizing its Ca2+-dependent interaction with protein binding targets, the three-dimensional structure of mts1 was determined in the apo state by NMR spectroscopy. As with other S100 protein family members, mts1 is a symmetric homodimer held together by noncovalent interactions between two helices from each subunit (helices 1, 4, 1', and 4') to form an X-type four-helix bundle. Each subunit of mts1 has two EF-hand Ca2+-binding domains: a pseudo-EF-hand (or S100-hand) and a typical EF-hand that are brought into proximity by a small two-stranded antiparallel beta-sheet. The S100-hand is formed by helices 1 and 2, and is similar in conformation to other members of the S100 family. In the typical EF-hand, the position of helix 3 is similar to that of another member of the S100 protein family, calcyclin (S100A6), and less like that of other S100 family members for which three-dimensional structures are available in the calcium-free state (e.g., S100B and S100A1). The differences in the position of helix 3 in the apo state of these four S100 proteins are likely due to variations in the amino acid sequence in the C-terminus of helix 4 and in loop 2 (the hinge region) and could potentially be used to subclassify the S100 protein family.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 North Greene Street, Baltimore, Maryland 21201, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Placental calcium-binding protein	A, B	101	Homo sapiens	Mutation(s): 0  Gene Names: S100A4, CAPL, MTS1
Find proteins for P26447 (Homo sapiens) Explore P26447  Go to UniProtKB:  P26447
NIH Common Fund Data Resources
PHAROS:  P26447 GTEx:  ENSG00000196154

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 1M31 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-06-26 
• Released Date: 2002-10-30 
Deposition Author(s): Vallely, K.M., Rustandi, R.R., Ellis, K.C., Varlamova, O., Bresnick, A.R., Weber, D.J.

Revision History  

• Version 1.0: 2002-10-30
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance