Soluble fibrin species in arterial thrombi

The aim of this study was to characterize soluble fibrin(ogen) species in human, arterial, in-vivo-formed thrombi, using the immunoblotting technique. Specimens were collected via intra-arterial catheters in six patients scheduled for catheter-directed thrombolysis. Unreduced and reduced samples of the supernatants from the arterial thrombi...

Dephosphorylation-induced structural changes in β-casein and its amphiphilic fragment in relation to emulsion properties

To promote the understanding of the relationship between emulsifying and molecular properties of proteins/peptides, intact β-casein (βCN) and its amphipathic fragment, i.e. βCN (1-105/107) were dephosphorylated. Dephosphorylation was found not to change significantly their emulsifying properties. Since it is known that the structure of proteins...

Heat denaturation of soy glycinin: Influence of pH and ionic strength on molecular structure

The 7S/11S glycinin equilibrium as found in Lakemond et al. (J. Agric. Food Chem. 2000, 48, xxxxxxxx) at ambient temperatures influences heat denaturation. It is found that the 7S form of glycinin denatures at a lower temperature than the 11S form, as demonstrated by a combination of calorimetric (DSC) and circular dichroism (CD) experiments. At...

Soy glycinin Influence of pH and ionic strength on solubility and molecular structure at ambient temperatures

This study describes the relationship between the solubility of glycinin, a major soy protein, and its structural properties at a quaternary, tertiary, and secondary folding level under conditions representative for food products. When the ionic strength is lowered from 0.5 to 0.2 or 0.03, the basic polypeptides shift more to the exterior of the...

Localization of synthesis of β1,6-glucan in Saccharomyces cerevisiae

β1,6-Glucan is a key component of the yeast cell wall, interconnecting cell wall proteins, β1,3-glucan, and chitin. It has been postulated that the synthesis of β1,6-glucan begins in the endoplasmic reticulum with the formation of protein-bound primer structures and that these primer structures are extended in the Golgi complex by two putative...

Isolation and characterization of patatin isoforms

Patatin has, so far, been considered a homogeneous group of proteins. A comparison of the isoforms in terms of structural properties or stability has not been reported. A method to obtain various isoform fractions as well as a comparison of the physicochemical properties of these pools is presented. Patatin could be separated in four isoform...

The adsorption-induced secondary structure of β-casein and of distinct parts of its sequence in relation to foam and emulsion properties

Changes in the secondary structure upon adsorption of β-casein (βCN) and of distinct parts of its sequence were investigated by far-ultraviolet circular dichroism in order to find suggested relationships with foam and emulsion-forming and -stabilising properties of the same protein/peptides. A teflon/water interface was used as a model system...

Heat-induced conformational changes of patatin, the major potato tuber protein

This paper presents a first structural characterization of isolated patatin, the major potato tuber protein, at ambient and elevated temperatures. Isolated patatin at room temperature is a highly structured molecule at both secondary and tertiary levels. It is estimated from far-ultraviolet circular dichroism data that about 33% of the residues...

Lactic acid bacteria as antigen delivery vehicles for oral immunization purposes

In vaccination programmes in which large numbers of subjects are involved, the oral route of administration is more convenient as compared to the more frequently used parenteral route. This is particularly relevant when vaccines are to be applied in less industrialized countries. Lactic acid bacteria in general and strains of Lactobacillus in...

Secondary structure of the intact H+,K+ -ATPase and of its membrane-embedded region. An attenuated total reflection infrared spectroscopy, circular dichroism and Raman spectroscopy study

Models of P-type ATPase predict that membrane-embedded fragments represent about 20% of the protein and adopt an all-α-helical structure. While this prediction was confirmed for the Ca2+ -ATPase [Corbalan-Garcia, S., Teruel, J., Villalain, J. and Gomez-Fernandez, J. (1994) Biochemistry 33, 8247-8254], it is at odds with recent experimental...

Expression, secretion and antigenic variation of bacterial S-layer proteins

The function of the S-layer, a regularly arranged structure on the outside of numerous bacteria, appears to be different for bacteria living in different environments. Almost no similarity exists between the primary sequences of S-proteins, although their amino acid composition is comparable. S-protein production is directed by single or...

Molecular characterization of a saline-soluble lectin from a parasitic fungus: Extensive sequence similarities between fungal lectins

It has been proposed that the interactions between several parasite and pathogenic fungi and their hosts are mediated by soluble lectins present in the fungus. We have cloned and analyzed a gene encoding such a lectin (AOL) from the nematophagous fungus Arthrobotrys oligospora (deuteromycete). The deduced primary structure of the AOL gene...

Familial dysfibrinogenemia and thrombophilia - Report on a study of the SSC subcommittee on fibrinogen

Approximately 250 cases of dysfibrinogenemia have been reported; 55% were asymptomatic (detected by chance), 25% had a tendency to bleeding, and 20% were reported to have a tendency to thrombosis. To establish a possible association between familial dysfibrinogenemia and thrombophilia, data on cases with both affections were collected in a study...

Dynamic structure of human serum transferrin from transient electric birefringence experiments

In order to investigate the secondary, tertiary, and dynamic structure of the iron-free (apo) and iron-saturated (holo) forms of human serum transferrin and its amino (N)-terminal lobe at the physiologically relevant pHs 7.4 and 5.0, we have combined ultraviolet circular dichroism (CD) spectroscopy with transient-electric birefringence (TEB)...

Inactivation of high and low molecular weight single-chain urokinase-type plasminogen activator (pro-urokinase) by thrombin in the presence of thrombomodulin

Chemicals/CAS: amino acid, 65072-01-7; prourokinase, 82657-92-9; thrombin, 9002-04-4; thrombomodulin, 112049-68-0; Enzyme Precursors; Receptors, Cell Surface; Receptors, Thrombin; saruplase, 99149-95-8; Thrombin, EC 3.4.21.5; Urinary Plasminogen Activator, EC 3.4.21.73

Nucleotide sequence of the Aspergillus niger trpC gene: Structural relationship with analogous genes of other organisms

Molecular Sequence Numbers: GENBANK: X07071; Chemicals/CAS: tryptophan, 6912-86-3, 73-22-3; DNA Restriction Enzymes, EC 3.1.21; Tryptophan, 73-22-3

Relationships between structure and function of tissue-type plasminogen activator

This mini-review deals with structure-function relationships of human-tissue type plasminogen activator. The enzyme consists of a single polypeptide chain of 527 amino acids. A two-chain form is produced by proteolytic cleavage of the Arg 275-Ile 276 peptide bond. The aminoterminal heavy or A-chain consists of a finger domain, a growth factor...