A preliminary crystallographic study of CDCP2 fromArabidopsis thaliana

Matrix porin, the ompF gene product of E. coli, has been the object of a electron crystallographic study of its pore geometry in an attempt to understand its function as a membrane molecular sieve. Three polymorphic forms have been found for two-dimensional crystals reconstituted in phospholipid, two hexagonal forms with different lipid content and an orthorhombic form coexisting with and similar to the hexagonal form found after lipid loss. In projection these have been shown to retain the same three-fold pore triplet geometry and analyses of three-dimensional data reveal that the small hexagonal and orthorhombic polymorphs have similar structure as well as unit cell spacings.

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A Crystallographic Study of Bis[S-benzyl-5-bromo-2-oxoindolin-3-ylidenemethanehydrazonthioate] Disulfide Solvated with Dimethylsulfoxide

Scientific Research Journal ◽

10.24191/srj.v9i2.9410 ◽

2012 ◽

Vol 9 (2) ◽

pp. 87

Author(s):

Mohd Abdul Fatah Abdul Manan ◽

M. Ibrahim M. Tahir ◽

Karen A. Crouse ◽

Fiona N.-F. How ◽

David J. Watkin

Keyword(s):

Crystal Structure ◽

Hydrogen Bonds ◽

Solvent Molecule ◽

Site Occupancy ◽

Unit Cell Parameters ◽

Intermolecular Hydrogen Bonds ◽

Triclinic Space Group ◽

Cell Parameters ◽

Crystallographic Study ◽

Thiol Form

The crystal structure of the title compound has been determined. The compound crystallized in the triclinic space group P -1, Z = 2, V = 1839 .42( 18) A3 and unit cell parameters a= 11. 0460( 6) A, b = 13 .3180(7) A, c=13. 7321 (8) A, a = 80.659(3 )0, b = 69 .800(3 )0 and g = 77 .007 (2)0 with one disordered dimethylsulfoxide solvent molecule with the sulfur and oxygen atoms are distributed over two sites; S101/S102 [site occupancy factors: 0.6035/0.3965] and 0130/0131 [site occupancy factor 0.3965/0.6035]. The C22-S2 l and C 19-S20 bond distances of 1. 779(7) A and 1. 788(8) A indicate that both of the molecules are connected by the disulfide bond [S20-S21 2.055(2) A] in its thiol form. The crystal structure reveals that both of the 5-bromoisatin moieties are trans with respect to the [S21-S20 and CI 9-Nl 8] and [S20-S21 and C22-N23] bonds whereas the benzyl group from the dithiocarbazate are in the cis configuration with respect to [S21-S20 and C19-S44] and [S20-S21 and C22-S36] bonds. The crystal structure is further stabilized by intermolecular hydrogen bonds of N9-H35···O16 formed between the two molecules and N28-H281 ···O130, N28-H281 ···O131 and C4 l-H4 l l ···O 131 with the solvent molecule.

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Building a Picture of Heteroborane Isomerisation: Synthesis and Characterisation of the 10-(Dialkyl- sulfane)-7,8-diphenyl-7,8-dicarba-nido-undecaboranes 7,8-Ph2-10-L-7,8-nido-C2B9H10 (L = SMe2, SMeEt, SEt2) and of Intermediate and Isomerised Products Arising from Metallation of the First of These

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19991013 ◽

1999 ◽

Vol 64 (6) ◽

pp. 1013-1027 ◽

Cited By ~ 21

Author(s):

Shirley Dunn ◽

Rhona M. Garrioch ◽

Georgina M. Rosair ◽

Lorraine Smith ◽

Alan J. Welch

Keyword(s):

Boron Atom ◽

Experimental Information ◽

Crystallographic Study

Three new, substituted, nido carboranes, 7,8-Ph2-10-(SMe2)-7,8-nido-C2B9H10 (1a), 7,8-Ph2-10- (SMeEt)-7,8-nido-C2B9H10 (1b) and 7,8-Ph2-10-(SEt2)-7,8-nido-C2B9H10 (1c) have been synthesised and characterised, including a crystallographic study of the first. Deprotonation of 1a followed by treatment with (MeCN)2(CO)2MoBr(η-C3H5) at 0 °C affords the non-icosahedral 1,2-Ph2-4-(SMe2)-5-(η-C3H5)-5,5-(CO)2-5,1,2-closo-MoC2B9H8 (2a), which on subsequent warming transforms into icosahedral 2,8-Ph2-5-(SMe2)-1-(η-C3H5)-1,1-(CO)2-1,2,8-closo- MoC2B9H8 (3a). It is argued that under the conditions of these rearrangements the B-S bond is likely to remain intact, and consequently that the identity of the SMe2-labelled boron atom in 3a affords useful experimental information on the course of the isomerisation.

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X-ray Crystallographic Study of Alkylammonium Anthracene-9-carboxylates as a Model for Fibrous Structure of Binary Anthracene Salt Gels

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20041292 ◽

2004 ◽

Vol 69 (6) ◽

pp. 1292-1300 ◽

Cited By ~ 1

Author(s):

Tahahiro Tani ◽

Kazuki Sada ◽

Masatsugu Ayabe ◽

Yuya Iwashita ◽

Takanori Kishida ◽

...

Keyword(s):

Alkyl Chain ◽

Columnar Structure ◽

Hydrogen Bond Network ◽

One Dimensional ◽

X Ray ◽

Crystallographic Study ◽

Alkylammonium Salts ◽

Bond Network ◽

Fibrous Assemblies ◽

Long Alkyl Chain

Crystal structure of hexylammonium anthracene-9-carboxylate was investigated. The salt was arranged by a one-dimensional hydrogen bond network to form a columnar structure in the crystalline state. This columnar structure should be the model of fibrous assemblies in the organogels of anthracene-9-carboxylate alkylammonium salts having a long alkyl chain.

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