7 documents found, page 1 of 1

Cloning of serine protease cDNAs from Crotalus durissus terrificus venom gland ...

Gyroxin is one of main serine proteases of Crotalus durissus terrificus venom, representing about 2% of the protein content in the crude venom. It is a 33 kDa glycoprotein with 3.8% by weight of sugar moiety. This toxin induces hemotoxicity in mice and a neurological condition called barrel rotation syndrome. In the present work, we report the molecular cloning of five new nucleotide sequences from a cDNA libra...

Membrane-translocating peptides and toxins: from nature to bedside

Today, different functional classes of bioactive peptides and toxins isolated from diverse sources of living organisms are known. In medicine, these polypeptides present the potential to be used structurally unmodified or to serve as templates for molecular design of improved derivatives. Here, we refer to members of three classes of remarkable peptides and toxins that act at the cell membranes level and membra...

Crotamine is a novel cell-penetrating protein from the venom of rattlesnake Cro...

Herein we report that crotamine, a small lysine- and cysteine-rich protein from the venom of the South American rattlesnake, can rapidly penetrate into different cell types and mouse blastocysts in vitro. In vivo, crotamine strongly labels cells from mouse bone marrow and spleen and from peritoneal liquid, as shown by fluorescent confocal laser-scanning microscopy. Nuclear localization of crotamine was observed...

Cytotoxic effects of crotamine are mediated through lysosomal membrane permeabi...

Crotamine, one of the main toxic components of Crotalus durissus terrificus venom, is a small non-enzymatic basic polypeptide, which causes hind limb paralysis and necrosis of muscle cells. It is well-known that several toxins penetrate into the cytosol through endocytosis, although in many cases the mechanism by which this occurs has not been fully investigated. Recently, using low concentrations of crotamine,...

Crotacetin, a Novel Snake Venom C-Type Lectin Homolog of Convulxin, Exhibits an...

Snake venom (sv) C-type lectins encompass a group of hemorrhagic toxins that are capable of interfering with blood stasis. A very well-studied svC-type lectin is the heterodimeric toxin, convulxin (CVX), from the venom of South American rattlesnake Crotalus durissus terrificus. CVX is able to activate platelets and induce their aggregation by acting via p62/GPVI collagen receptor. By using polymerase chain reac...

The density and biomass of mesozooplankton and ichthyoplankton in the Negro and...

The boundary zone between two different hydrological regimes is often a biologically enriched environment with distinct planktonic communities. In the center of the Amazon River basin, muddy white water of the Amazon River meets with black water of the Negro River, creating a conspicuous visible boundary spanning over 10kmalong the Amazon River. Here, we tested the hypothesis that the confluence boundary betwee...

Crotamine is a novel cell-penetrating protein from the venom of rattlesnake Cro...