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PMID:26853939

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Citation

Croll, TI, Smith, BJ, Margetts, MB, Whittaker, J, Weiss, MA, Ward, CW and Lawrence, MC (2016) Higher-Resolution Structure of the Human Insulin Receptor Ectodomain: Multi-Modal Inclusion of the Insert Domain. Structure 24:469-76

Abstract

Insulin receptor (IR) signaling is critical to controlling nutrient uptake and metabolism. However, only a low-resolution (3.8 Å) structure currently exists for the IR ectodomain, with some segments ill-defined or unmodeled due to disorder. Here, we revise this structure using new diffraction data to 3.3 Å resolution that allow improved modeling of the N-linked glycans, the first and third fibronectin type III domains, and the insert domain. A novel haptic interactive molecular dynamics strategy was used to aid fitting to low-resolution electron density maps. The resulting model provides a foundation for investigation of structural transitions in IR upon ligand binding.

Links

PubMed PMC4860004 Online version:10.1016/j.str.2015.12.014

Keywords

Antigens, CD/chemistry; Antigens, CD/metabolism; Binding Sites; Crystallography, X-Ray; Fibronectins/metabolism; Humans; Models, Molecular; Protein Binding; Protein Structure, Secondary; Protein Structure, Tertiary; Receptor, Insulin/chemistry; Receptor, Insulin/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

HUMAN:INSR

enables

GO:0042802: identical protein binding

ECO:0000353: physical interaction evidence used in manual assertion

UniProtKB:P06213-1

F

Seeded From UniProt

complete

Notes

See also

References

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