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Helga Hoier

Free University of Berlin

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Publication

Featured researches published by Helga Hoier.

Carbohydrate Research | 1998

Crystal structure of α-cyclodextrin-acetonitrile-hexahydrate

Thammarat Aree; Joël Jacob; Wolfram Saenger; Helga Hoier

Crystals of the ternary alpha-cyclodextrin-acetonitrile hexahydrate inclusion complex belong to the orthorhombic space group P212121 with unit cell dimensions a = 9.479(2), b = 14.323(4), c = 37.397(9) A. Refinement against 4202 X-ray diffraction data converged at R=0.059. The alpha-cyclodextrin macrocycle forms a regular torus which is stabilized by intramolecular O-3-O-2 hydrogen bonds between neighboring glucose units. Within the cavity, one acetonitrile and one water molecule are located with occupancy factors of 0.8 and 0.7. respectively. They are hydrogen bonded to disordered O65B, and acetonitrile is stabilized in position by C-5-H...N interactions. The remaining five water molecules link symmetry related cyclodextrin molecules.

Carbohydrate Research | 1999

Crystal structure of heptakis(2,6-di-O-methyl)-β-cyclodextrin dihydrate: a water molecule in an apolar cavity

Thammarat Aree; Wolfram Saenger; Peter Leibnitz; Helga Hoier

Angewandte Chemie | 2000

Novel Type of Thermostable Channel Clathrate Hydrate Formed by Heptakis(2,6‐di‐O‐methyl)‐β‐cyclodextrin⋅15 H2O—A Paradigm of the Hydrophobic Effect

Thammarat Aree; Helga Hoier; Burkhard Schulz; Günter Reck; Wolfram Saenger

Carbohydrate Research | 2000

Crystal structure of octakis(2,3,6-tri-O-methyl)-γ-cyclodextrin·4.5 H2O: evidence for conformational flexibility of permethylated cyclodextrins

Thammarat Aree; Helga Hoier; Burkhard Schulz; Günter Reck; Wolfram Saenger

Journal of the American Chemical Society | 1999

Variation of a Theme: Crystal Structure with Four Octakis(2,3,6-tri-O-methyl)-γ-cyclodextrin Molecules Hydrated Differently by a Total of 19.3 Water†,‡

Thammarat Aree; Isabel Usón; Burkhard Schulz; Günter Reck; Helga Hoier; George M. Sheldrick; Wolfram Saenger

Journal of Molecular Biology | 1999

Structural analysis of an RNase T1 variant with an altered guanine binding segment

Katja Höschler; Helga Hoier; Bernd Hubner; Wolfram Saenger; Peter Orth; Ulrich Hahn

Angewandte Chemie | 2000

Ein neuartiges thermostabiles Clathrat‐Hydrat mit Kanalstruktur aus Heptakis(2,6‐di‐O‐methyl)‐β‐cyclodextrin⋅15 H2O – ein Musterbeispiel für den hydrophoben Effekt

Thammarat Aree; Helga Hoier; Burkhard Schulz; Günter Reck; Wolfram Saenger

Carbohydrate Research | 1998

CRYSTAL STRUCTURE OF ALPHA -CYCLODEXTRIN-ACETONITRILE-HEXAHYDRATE

Thammarat Aree; Joël Jacob; Wolfram Saenger; Helga Hoier

Carbohydrate Research | 1999

Crystal structure of hexakis(2,6-di-O-methyl)-α-cyclodextrin–acetonitrile dihydrate: a channel formed by methyl groups harbors a chain of five partially occupied water sites

Thammarat Aree; Helga Hoier; Burkhard Schulz; Günter Reck; Wolfram Saenger

Journal of Molecular Biology | 1999

Structural analysis of an RNase T 1 variant with an altered guanine binding segment 1 1 Edited by R. Huber

Katja Höschler; Helga Hoier; Bernd Hubner; Wolfram Saenger; Peter Orth; Ulrich Hahn

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Wolfram Saenger

Free University of Berlin

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Thammarat Aree

Chulalongkorn University

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Burkhard Schulz

Bundesanstalt für Materialforschung und -prüfung

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Günter Reck

Bundesanstalt für Materialforschung und -prüfung

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Thammarat Aree

Chulalongkorn University

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Joël Jacob

Free University of Berlin

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Bernd Hubner

Leipzig University

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Katja Höschler

Leipzig University

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Peter Leibnitz

Bundesanstalt für Materialforschung und -prüfung

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Peter Orth

Free University of Berlin

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