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Original Paper

Sarcoplasmic Calcium-Binding Protein: Identification as a New Allergen of the Black Tiger Shrimp Penaeus monodon

Shiomi K. · Sato Y. · Hamamoto S. · Mita H. · Shimakura K.

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Department of Food Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan

Related Articles for ""

Int Arch Allergy Immunol 2008;146:91–98

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 29, 2007
Accepted: September 05, 2007
Published online: January 18, 2008
Issue release date: May 2008

Number of Print Pages: 8
Number of Figures: 5
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA

Abstract

Background: Tropomyosin and arginine kinase have been identified as crustacean allergens. During purification of arginine kinase from black tiger shrimp Penaeus monodon, we found a new allergen of 20-kDa. Methods: A 20-kDa allergen was purified from the abdominal muscle of black tiger shrimp by salting-out, anion-exchange HPLC and reverse-phase HPLC. Following digestion of the 20-kDa allergen with lysyl endopeptidase, peptide fragments were isolated by reverse-phase HPLC, and 2 of them were sequenced. The 20-kDa allergen, together with tropomyosin and arginine kinase purified from black tiger shrimp, was evaluated for IgE reactivity by ELISA. Five species of crustaceans (kuruma shrimp, American lobster, pink shrimp, king crab and snow crab) were surveyed for the 20-kDa allergen by immunoblotting. Results: The 20-kDa allergen was purified from black tiger shrimp and identified as a sarcoplasmic calcium-binding protein (SCP) based on the determined amino acid sequences of 2 enzymatic fragments. Of 16 sera from crustacean-allergic patients, 8 and 13 reacted to SCP and tropomyosin, respectively; the reactivity to arginine kinase was weakly recognized with 10 sera. In immunoblotting, an IgE-reactive 20-kDa protein was also detected in kuruma shrimp, American lobster and pink shrimp but not in 2 species of crab. Preadsorption of the sera with black tiger shrimp SCP abolished the IgE reactivity of the 20-kDa protein, suggesting the 20-kDa protein to be an SCP. Conclusions: SCP is a new crustacean allergen, and distribution of IgE-reactive SCP is probably limited to shrimp and crayfish.

© 2008 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 29, 2007
Accepted: September 05, 2007
Published online: January 18, 2008
Issue release date: May 2008

Number of Print Pages: 8
Number of Figures: 5
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA


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