Factor G utilizes a carbohydrate-binding cleft that is conserved between horseshoe crab and bacteria for the recognition of β-1,3-D-glucans

Yuki Ueda, Shuhei Ohwada, Yoshito Abe, Toshio Shibata, Manabu Iijima, Yukiko Yoshimitsu, Takumi Koshiba, Munehiro Nakata, Tadashi Ueda, Shun-Ichiro Kawabata

研究成果: ジャーナルへの寄稿記事

6 引用 (Scopus)

抄録

In the horseshoe crab, the recognition of β-1,3-D-glucans by factor G triggers hemolymph coagulation. Factor G contains a domain of two tandem xylanase Z-like modules (Z1-Z2), each of which recognizes β-1,3-D-glucans. To gain an insight into the recognition of β-1,3-D-glucans from a structural view point, recombinants of Z1-Z2, the C-terminal module Z2, Z2 with a Cys to Ala substitution (Z2A), and its tandem repeat Z2A-Z2A were characterized. Z2 and Z1-Z2, but not Z2A and Z2A-Z2A, formed insoluble aggregates at higher concentrations more than ∼30 and 3 μM, respectively. Z1-Z2 and Z2A-Z2A bound more strongly to an insoluble β-1,3-D-glucan (curdlan) than Z2A. The affinity of Z2A for a soluble β-1,3-D-glucan (laminarin) was equivalent to those of Z1-Z2, Z2A-Z2A, and native factor G, suggesting that the binding of a single xylanase Z-like module prevents the subsequent binding of another module to laminarin. Interestingly, Z2A as well as intact factor G exhibited fungal agglutinating activity, and fungi were specifically detected with fluorescently tagged Z2A by microscopy. The chemical shift perturbation of Z2A induced by the interaction with laminaripentaose was analyzed by nuclear magnetic resonance spectroscopy. The ligand-binding site of Z2A was located in a cleft on a β-sheet in a predicted β-sandwich structure, which was superimposed onto cleft B in a cellulose-binding module of endoglucanase 5A from the soil bacterium Cellvibrio mixtus. We conclude that the pattern recognition for β-1,3-D-glucans by factor G is accomplished via a carbohydrate-binding cleft that is evolutionally conserved between horseshoe crab and bacteria.

元の言語英語
ページ(範囲)3810-3818
ページ数9
ジャーナルJournal of Immunology
183
発行部数6
DOI
出版物ステータス出版済み - 9 15 2009

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Horseshoe Crabs
Carbohydrates
Bacteria
Endo-1,4-beta Xylanases
Cellvibrio
Tandem Repeat Sequences
Hemolymph
Cellulase
Cellulose
polyglucosan
Microscopy
Fungi
Magnetic Resonance Spectroscopy
Soil
Binding Sites
Ligands

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology

これを引用

Factor G utilizes a carbohydrate-binding cleft that is conserved between horseshoe crab and bacteria for the recognition of β-1,3-D-glucans. / Ueda, Yuki; Ohwada, Shuhei; Abe, Yoshito; Shibata, Toshio; Iijima, Manabu; Yoshimitsu, Yukiko; Koshiba, Takumi; Nakata, Munehiro; Ueda, Tadashi; Kawabata, Shun-Ichiro.

:: Journal of Immunology, 巻 183, 番号 6, 15.09.2009, p. 3810-3818.

研究成果: ジャーナルへの寄稿記事

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abstract = "In the horseshoe crab, the recognition of β-1,3-D-glucans by factor G triggers hemolymph coagulation. Factor G contains a domain of two tandem xylanase Z-like modules (Z1-Z2), each of which recognizes β-1,3-D-glucans. To gain an insight into the recognition of β-1,3-D-glucans from a structural view point, recombinants of Z1-Z2, the C-terminal module Z2, Z2 with a Cys to Ala substitution (Z2A), and its tandem repeat Z2A-Z2A were characterized. Z2 and Z1-Z2, but not Z2A and Z2A-Z2A, formed insoluble aggregates at higher concentrations more than ∼30 and 3 μM, respectively. Z1-Z2 and Z2A-Z2A bound more strongly to an insoluble β-1,3-D-glucan (curdlan) than Z2A. The affinity of Z2A for a soluble β-1,3-D-glucan (laminarin) was equivalent to those of Z1-Z2, Z2A-Z2A, and native factor G, suggesting that the binding of a single xylanase Z-like module prevents the subsequent binding of another module to laminarin. Interestingly, Z2A as well as intact factor G exhibited fungal agglutinating activity, and fungi were specifically detected with fluorescently tagged Z2A by microscopy. The chemical shift perturbation of Z2A induced by the interaction with laminaripentaose was analyzed by nuclear magnetic resonance spectroscopy. The ligand-binding site of Z2A was located in a cleft on a β-sheet in a predicted β-sandwich structure, which was superimposed onto cleft B in a cellulose-binding module of endoglucanase 5A from the soil bacterium Cellvibrio mixtus. We conclude that the pattern recognition for β-1,3-D-glucans by factor G is accomplished via a carbohydrate-binding cleft that is evolutionally conserved between horseshoe crab and bacteria.",
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T1 - Factor G utilizes a carbohydrate-binding cleft that is conserved between horseshoe crab and bacteria for the recognition of β-1,3-D-glucans

AU - Ueda, Yuki

AU - Ohwada, Shuhei

AU - Abe, Yoshito

AU - Shibata, Toshio

AU - Iijima, Manabu

AU - Yoshimitsu, Yukiko

AU - Koshiba, Takumi

AU - Nakata, Munehiro

AU - Ueda, Tadashi

AU - Kawabata, Shun-Ichiro

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