Importance of the character and configuration of residues B24, B25, and B26 in insulin-receptor interactions

Raghu Mirmira, Satoe H. Nakagawa, Howard S. Tager

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

By use of isolated canine hepatocytes and insulin analogs prepared by trypsin-catalyzed semisynthesis, we have investigated the importance of the aromatic triplet PheB24-PheB25-TyrB26 of the COOH-terminal B-chain domain of insulin in directing the affinity of insulin-receptor interactions. Analysis of the receptor binding potencies of analogs bearing transpositions or replacements (by Tyr, D-Tyr or their corresponding 3,5-diiodo derivatives) in this region demonstrates a wide divergence in the acceptance both of configurational change (with [D-TyrB24,PheB26]insulin and [D-TyrB25,PheB26]insulin exhibiting 160 and 0.1% of the receptor binding potency of insulin, respectively) and of detailed side chain structure (with [TyrB24,PheB26] insulin and [TyrB25,PheB26]insulin exhibiting 2 and 80% of the receptor binding potency of insulin, respectively). Additional experiments addressed the solvent accessibilities of the 4 tyrosine residues of insulin and the insulin analogs at selected peptide concentrations by use of analytical radioiodination. Whereas two analogs ([TyrB25,PheB26]insulin and [D-TyrB24,PheB26]insulin) were found to undergo self aggregation, no strict correlation was found between the ability of an analog to aggregate and its potency for interaction with the insulin receptor. Related findings are discussed in terms of the interplay between side chain and main chain structure in the COOH-terminal domain of the insulin B-chain and the structural attributes of insulin that determine the affinity of insulin-receptor interactions.

Original languageEnglish (US)
Pages (from-to)1428-1436
Number of pages9
JournalJournal of Biological Chemistry
Volume266
Issue number3
StatePublished - Jan 25 1991
Externally publishedYes

Fingerprint

Insulin Receptor
Insulin
Bearings (structural)
Trypsin
Tyrosine
Canidae
Hepatocytes
Agglomeration

ASJC Scopus subject areas

  • Biochemistry

Cite this

Importance of the character and configuration of residues B24, B25, and B26 in insulin-receptor interactions. / Mirmira, Raghu; Nakagawa, Satoe H.; Tager, Howard S.

In: Journal of Biological Chemistry, Vol. 266, No. 3, 25.01.1991, p. 1428-1436.

Research output: Contribution to journalArticle

@article{9909b466f38147f49780e9fd05cf518d,
title = "Importance of the character and configuration of residues B24, B25, and B26 in insulin-receptor interactions",
abstract = "By use of isolated canine hepatocytes and insulin analogs prepared by trypsin-catalyzed semisynthesis, we have investigated the importance of the aromatic triplet PheB24-PheB25-TyrB26 of the COOH-terminal B-chain domain of insulin in directing the affinity of insulin-receptor interactions. Analysis of the receptor binding potencies of analogs bearing transpositions or replacements (by Tyr, D-Tyr or their corresponding 3,5-diiodo derivatives) in this region demonstrates a wide divergence in the acceptance both of configurational change (with [D-TyrB24,PheB26]insulin and [D-TyrB25,PheB26]insulin exhibiting 160 and 0.1{\%} of the receptor binding potency of insulin, respectively) and of detailed side chain structure (with [TyrB24,PheB26] insulin and [TyrB25,PheB26]insulin exhibiting 2 and 80{\%} of the receptor binding potency of insulin, respectively). Additional experiments addressed the solvent accessibilities of the 4 tyrosine residues of insulin and the insulin analogs at selected peptide concentrations by use of analytical radioiodination. Whereas two analogs ([TyrB25,PheB26]insulin and [D-TyrB24,PheB26]insulin) were found to undergo self aggregation, no strict correlation was found between the ability of an analog to aggregate and its potency for interaction with the insulin receptor. Related findings are discussed in terms of the interplay between side chain and main chain structure in the COOH-terminal domain of the insulin B-chain and the structural attributes of insulin that determine the affinity of insulin-receptor interactions.",
author = "Raghu Mirmira and Nakagawa, {Satoe H.} and Tager, {Howard S.}",
year = "1991",
month = "1",
day = "25",
language = "English (US)",
volume = "266",
pages = "1428--1436",
journal = "Journal of Biological Chemistry",
issn = "0021-9258",
publisher = "American Society for Biochemistry and Molecular Biology Inc.",
number = "3",

}

TY - JOUR

T1 - Importance of the character and configuration of residues B24, B25, and B26 in insulin-receptor interactions

AU - Mirmira, Raghu

AU - Nakagawa, Satoe H.

AU - Tager, Howard S.

PY - 1991/1/25

Y1 - 1991/1/25

N2 - By use of isolated canine hepatocytes and insulin analogs prepared by trypsin-catalyzed semisynthesis, we have investigated the importance of the aromatic triplet PheB24-PheB25-TyrB26 of the COOH-terminal B-chain domain of insulin in directing the affinity of insulin-receptor interactions. Analysis of the receptor binding potencies of analogs bearing transpositions or replacements (by Tyr, D-Tyr or their corresponding 3,5-diiodo derivatives) in this region demonstrates a wide divergence in the acceptance both of configurational change (with [D-TyrB24,PheB26]insulin and [D-TyrB25,PheB26]insulin exhibiting 160 and 0.1% of the receptor binding potency of insulin, respectively) and of detailed side chain structure (with [TyrB24,PheB26] insulin and [TyrB25,PheB26]insulin exhibiting 2 and 80% of the receptor binding potency of insulin, respectively). Additional experiments addressed the solvent accessibilities of the 4 tyrosine residues of insulin and the insulin analogs at selected peptide concentrations by use of analytical radioiodination. Whereas two analogs ([TyrB25,PheB26]insulin and [D-TyrB24,PheB26]insulin) were found to undergo self aggregation, no strict correlation was found between the ability of an analog to aggregate and its potency for interaction with the insulin receptor. Related findings are discussed in terms of the interplay between side chain and main chain structure in the COOH-terminal domain of the insulin B-chain and the structural attributes of insulin that determine the affinity of insulin-receptor interactions.

AB - By use of isolated canine hepatocytes and insulin analogs prepared by trypsin-catalyzed semisynthesis, we have investigated the importance of the aromatic triplet PheB24-PheB25-TyrB26 of the COOH-terminal B-chain domain of insulin in directing the affinity of insulin-receptor interactions. Analysis of the receptor binding potencies of analogs bearing transpositions or replacements (by Tyr, D-Tyr or their corresponding 3,5-diiodo derivatives) in this region demonstrates a wide divergence in the acceptance both of configurational change (with [D-TyrB24,PheB26]insulin and [D-TyrB25,PheB26]insulin exhibiting 160 and 0.1% of the receptor binding potency of insulin, respectively) and of detailed side chain structure (with [TyrB24,PheB26] insulin and [TyrB25,PheB26]insulin exhibiting 2 and 80% of the receptor binding potency of insulin, respectively). Additional experiments addressed the solvent accessibilities of the 4 tyrosine residues of insulin and the insulin analogs at selected peptide concentrations by use of analytical radioiodination. Whereas two analogs ([TyrB25,PheB26]insulin and [D-TyrB24,PheB26]insulin) were found to undergo self aggregation, no strict correlation was found between the ability of an analog to aggregate and its potency for interaction with the insulin receptor. Related findings are discussed in terms of the interplay between side chain and main chain structure in the COOH-terminal domain of the insulin B-chain and the structural attributes of insulin that determine the affinity of insulin-receptor interactions.

UR - http://www.scopus.com/inward/record.url?scp=0025978173&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025978173&partnerID=8YFLogxK

M3 - Article

C2 - 1988428

AN - SCOPUS:0025978173

VL - 266

SP - 1428

EP - 1436

JO - Journal of Biological Chemistry

JF - Journal of Biological Chemistry

SN - 0021-9258

IS - 3

ER -