Macromolecule Content

• Total Structure Weight: 5.82 kDa 
• Atom Count: 404 
• Residue Count: 51 
• Unique protein chains: 2

2HH4

NMR structure of human insulin mutant GLY-B8-D-SER, HIS-B10-ASP PRO-B28-LYS, LYS-B29-PRO, 20 structures

• DOI: 10.2210/pdb2HH4/pdb

• Classification: HORMONE/GROWTH FACTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-06-27 Released: 2006-07-18 
• Deposition Author(s): Hua, Q.X., Nakagawa, S., Hu, S.Q., Jia, W., Weiss, M.A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Toward the Active Conformation of Insulin: Stereospecific modulation of a structural switch in the B chain.

Hua, Q.X., Nakagawa, S., Hu, S.Q., Jia, W., Wang, S., Weiss, M.A.

(2006) J Biol Chem 281: 24900-24909

• PubMed: 16762918 
• DOI: 10.1074/jbc.M602691200
• Primary Citation of Related Structures:  
  2HHO, 2HH4


• PubMed Abstract: 
  

How insulin binds to the insulin receptor has long been a subject of speculation. Although the structure of the free hormone has been extensively characterized, a variety of evidence suggests that a conformational change occurs upon receptor binding. Here, we employ chiral mutagenesis, comparison of corresponding d and l amino acid substitutions, to investigate a possible switch in the B-chain. To investigate the interrelation of structure, function, and stability, isomeric analogs have been synthesized in which an invariant glycine in a beta-turn (Gly(B8)) is replaced by d- or l-Ser. The d substitution enhances stability (DeltaDeltaG(u) 0.9 kcal/mol) but impairs receptor binding by 100-fold; by contrast, the l substitution markedly impairs stability (DeltaDeltaG(u) -3.0 kcal/mol) with only 2-fold reduction in receptor binding. Although the isomeric structures each retain a native-like overall fold, the l-Ser(B8) analog exhibits fewer helix-related and long range nuclear Overhauser effects than does the d-Ser(B8) analog or native monomer. Evidence for enhanced conformational fluctuations in the unstable analog is provided by its attenuated CD spectrum. The inverse relationship between stereospecific stabilization and receptor binding strongly suggests that the B7-B10 beta-turn changes conformation on receptor binding.

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Organizational Affiliation: 

Department of Biochemistry, Case Western Reserve University, Cleveland, Ohio 44106, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
insulin A chain	A	21	Homo sapiens	Mutation(s): 0  Gene Names: INS
Find proteins for P01308 (Homo sapiens) Explore P01308  Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS  P01308

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
insulin B chain	B	30	Homo sapiens	Mutation(s): 4  Gene Names: INS
Find proteins for P01308 (Homo sapiens) Explore P01308  Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS  P01308

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2HH4 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-27 
• Released Date: 2006-07-18 
Deposition Author(s): Hua, Q.X., Nakagawa, S., Hu, S.Q., Jia, W., Weiss, M.A.

Revision History 

• Version 1.0: 2006-07-18
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance