scholarly journals Disintegrin Domain

2020 ◽  
Author(s):  
Keyword(s):  
Disintegrin Domain

scholarly journals Examination of the Efficacy and Cross-Reactivity of a Novel Polyclonal Antibody Targeting the Disintegrin Domain in SVMPs to Neutralize Snake Venom

Toxins ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 254
Author(s):  
Shelby S. Szteiter ◽  
Ilse N. Diego ◽  
Jonathan Ortegon ◽  
Eliana Salinas ◽  
Abcde Cirilo ◽  
...  
Keyword(s):  
Snake Venom ◽  
Polyclonal Antibody ◽  
Polyclonal Antibodies ◽  
Cross Reactivity ◽  
Snake Envenomation ◽  
Disintegrin Domain ◽  
The Common ◽  
Neutralization Ability ◽  
New Strategies

Snake envenomation can result in hemorrhage, local necrosis, swelling, and if not treated properly can lead to adverse systemic effects such as coagulopathy, nephrotoxicity, neurotoxicity, and cardiotoxicity, which can result in death. As such, snake venom metalloproteinases (SVMPs) and disintegrins are two toxic components that contribute to hemorrhage and interfere with the hemostatic system. Administration of a commercial antivenom is the common antidote to treat snake envenomation, but the high-cost, lack of efficacy, side effects, and limited availability, necessitates the development of new strategies and approaches for therapeutic treatments. Herein, we describe the neutralization ability of anti-disintegrin polyclonal antibody on the activities of isolated disintegrins, P-II/P-III SVMPs, and crude venoms. Our results show disintegrin activity on platelet aggregation in whole blood and the migration of the SK-Mel-28 cells that can be neutralized with anti-disintegrin polyclonal antibody. We characterized a SVMP and found that anti-disintegrin was also able to inhibit its activity in an in vitro proteolytic assay. Moreover, we found that anti-disintegrin could neutralize the proteolytic and hemorrhagic activities from crude Crotalus atrox venom. Our results suggest that anti-disintegrin polyclonal antibodies have the potential for a targeted approach to neutralize SVMPs in the treatment of snakebite envenomations.

scholarly journals Identification of a binding site in the disintegrin domain of fertilin required for sperm-egg fusion.

1994 ◽  
Vol 91 (10) ◽  
pp. 4195-4198 ◽  
Author(s):  
D. G. Myles ◽  
L. H. Kimmel ◽  
C. P. Blobel ◽  
J. M. White ◽  
P. Primakoff
Keyword(s):  
Binding Site ◽  
Disintegrin Domain

Mouse sperm-egg plasma membrane interactions: analysis of roles of egg integrins and the mouse sperm homologue of PH-30 (fertilin) beta

1995 ◽  
Vol 108 (10) ◽  
pp. 3267-3278 ◽  
Author(s):  
J.P. Evans ◽  
R.M. Schultz ◽  
G.S. Kopf
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Guinea Pig ◽  
Ligand Binding ◽  
Zona Pellucida ◽  
Plasma Membranes ◽  
Signal Sequence ◽  
Rgd Peptides ◽  
Mouse Sperm ◽  
Disintegrin Domain

The guinea pig sperm protein, PH-30 (also known as fertilin), is postulated to participate in the interaction between the sperm and egg plasma membranes. The beta subunit of guinea pig PH-30 (gpPH-30 beta) contains a domain with homology to disintegrins, snake venom proteins that bind to integrins via an integrin-binding domain containing the tripeptide RGD. This raises the question of whether an egg integrin serves as a receptor for PH-30. Although mouse eggs express integrin subunits, their role in mouse fertilization is unresolved. Therefore, we examined fertilization for two different hallmarks of integrin function, namely, dependence of ligand binding on divalent cations and the ability to inhibit ligand binding with RGD peptides. We demonstrate that sperm binding to zona pellucida-free eggs is supported by Ca2+, Mg2+, or Mn2+. Ca2+ was necessary and sufficient for sperm-egg fusion, with 2.5 mM Ca2+ being the most effective concentration. In addition, fertilization could be partially inhibited with various RGD peptides, which caused a decrease in sperm-egg fusion by 30–58%. This partial inhibition of fusion with RGD peptides prompted the cloning of the mouse homologue of gpPH-30 beta (hereafter referred to as mPH-30 beta) to determine if it possessed the tripeptide RGD or a different amino acid sequence in its disintegrin domain. mPH-30 beta, which is expressed during meiotic and post-meiotic phases of spermatogenesis, shares significant similarities to gpPH-30 beta throughout the length of the molecule, from the signal sequence to the cytoplasmic tail. The full-length deduced amino acid sequence of mPH-30 beta. The disintegrin domain of mPH-30 beta has the tripeptide QDE (instead of RGD) in its cell recognition region. Peptides containing this QDE sequence decrease the binding and fusion of sperm with zona pellucida-free eggs by approximately 70%, suggesting that the disintegrin domain of mPH-30 beta participates in the interaction between sperm and egg membranes.

Metalloprotease-disintegrins: modular proteins capable of promoting cell-cell interactions and triggering signals by protein-ectodomain shedding

1999 ◽  
Vol 112 (21) ◽  
pp. 3603-3617 ◽  
Author(s):  
J. Schlondorff ◽  
C.P. Blobel
Keyword(s):  
Tumor Necrosis ◽  
Ectodomain Shedding ◽  
Membrane Glycoproteins ◽  
Tnf Α ◽  
Disintegrin Domain ◽  
Protein Ectodomain Shedding ◽  
Integrin Ligands ◽  
Factor Α ◽  
Necrosis Factor

Metalloprotease-disintegrins (ADAMs) have captured our attention as key players in fertilization and in the processing of the ectodomains of proteins such as tumor necrosis factor (α) (TNF(α)), and because of their roles in Notch-mediated signaling, neurogenesis and muscle fusion. ADAMs are integral membrane glycoproteins that contain a disintegrin domain, which is related to snake-venom integrin ligands, and a metalloprotease domain (which can contain or lack a catalytic site). Here, we review and critically discuss current topics in the ADAMs field, including the central role of fertilin in fertilization, the role of the TNF(α) convertase in protein ectodomain processing, the role of Kuzbanian in Notch signaling, and links between ADAMs and processing of the amyloid-precursor protein.

Interaction of metargidin (ADAM-15) with alphavbeta3 and alpha5beta1 integrins on different haemopoietic cells

1999 ◽  
Vol 112 (4) ◽  
pp. 579-587 ◽  
Author(s):  
D. Nath ◽  
P.M. Slocombe ◽  
P.E. Stephens ◽  
A. Warn ◽  
G.R. Hutchinson ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Cell Line ◽  
Cell Lines ◽  
Solid Phase ◽  
Phase Cell ◽  
Cell Binding ◽  
Amino Terminal ◽  
Disintegrin Domain ◽  
Haemopoietic Cells ◽  
Adhesion Assays

Metargidin (ADAM-15) is a type I transmembrane glycoprotein belonging to the ADAM (A Disintegrin and Metalloprotease Domain) family of proteins and is widely expressed in different tissues and cell types. Members of this family contain an amino-terminal metalloprotease domain followed by a disintegrin domain, a cysteine-rich region and a membrane proximal EGF-like domain. The disintegrin domain of metargidin contains an RGD tripeptide sequence, suggesting that it may potentially interact with the integrin family of proteins. Here we identify integrin ligands for metargidin on haemopoietic cells, by using a chimeric protein containing the extracellular domain of metargidin fused to the Fc portion of human IgG. Binding activity to a panel of human cell lines was analysed by solid-phase cell-adhesion assays. Metargidin bound to a monocytic cell line, U937, and a T cell line, MOLT-4, in a specific manner. Adhesion was divalent cation- and temperature- dependent and strongly enhanced by Mn2+, all features of integrin-mediated binding. Using a panel of anti-integrin antibodies we show that alphavbeta3 is a ligand for metargidin on U937 cells. In contrast, for MOLT-4 cells, the integrin alpha5beta1 contributes to cell binding. Adhesion was mediated by the disintegrin domain of metargidin as RGD-based peptides inhibited cell binding to both cell lines. The specificity of the interaction between both alphavbeta3 and alpha5beta1 and metargidin was further confirmed by solid-phase adhesion assays using purified recombinant integrins. These results together indicate that metargidin can function as a cell adhesion molecule via interactions with alphavbeta3 and alpha5beta1 integrins.

scholarly journals The disintegrin domain of ADAM9: a ligand for multiple β1 renal integrins

2005 ◽  
Vol 385 (2) ◽  
pp. 461-468 ◽  
Author(s):  
Rajeev M. MAHIMKAR ◽  
Orvin VISAYA ◽  
Allan S. POLLOCK ◽  
David H. LOVETT
Keyword(s):  
Fluorescent Protein ◽  
Competitive Inhibition ◽  
Β1 Integrin ◽  
Hek 293 ◽  
Hek 293 Cells ◽  
Cell Matrix ◽  
293 Cells ◽  
Β1 Integrins ◽  
Disintegrin Domain ◽  
Renal Tubular

Renal tubular epithelial cells in all nephron segments express a distinct member of the metalloprotease-disintegrin family, ADAM9 (adisintegrin and metalloprotease 9), in a punctate basolateral distribution co-localized to the β1 integrin chain [Mahimkar, Baricos, Visaya, Pollock and Lovett (2000) J. Am. Soc. Nephrol. 11, 595–603]. Discrete segments of the nephron express several defined β1 integrins, suggesting that ADAM9 interacts with multiple renal integrins and thereby regulates epithelial cell–matrix interactions. Intact ADAM9 and a series of deletion constructs sequentially lacking the metalloprotease domain and the disintegrin domain were assembled as chimaeras with a C-terminal GFP (green fluorescent protein) tag. Stable expression of the ADAM9/GFP protein on the surface of HEK-293 cells (human embryonic kidney 293 cells) significantly decreased adhesion to types I and IV collagen, vitronectin and laminin, but had little effect on adhesion to fibronectin. Expression of the disintegrin/cysteine-rich/GFP construct yielded a similar, but more marked pattern of decreased adhesion. Expression of the cysteine-rich/GFP construct had no effect on adhesion, indicating that the disintegrin domain was responsible for the competitive inhibition of cell–matrix binding. To define the specific renal tubular β1 integrins interacting with the ADAM9 disintegrin domain, a recombinant GST (glutathione S-transferase)-disintegrin protein was used as a substrate in adhesion assays in the presence or absence of specific integrin-blocking antibodies. Inclusion of antibodies to α1, α3, α6, αv and β1 blocked adhesion of HEK-293 cells to GST-disintegrin protein. Immobilized GST-disintegrin domain perfused with renal cortical lysates specifically recovered the α3, α6, αv and β1 integrin chains by Western analysis. It is concluded that ADAM9 is a polyvalent ligand, through its disintegrin domain, for multiple renal integrins of the β1 class.

scholarly journals Importance of the Porcine ADAM3 Disintegrin Domain in Sperm-Egg Interaction

2009 ◽  
Vol 55 (2) ◽  
pp. 156-162 ◽  
Author(s):  
Ekyune KIM ◽  
Ki-Eun PARK ◽  
Ji-Su KIM ◽  
Dong Chul BAEK ◽  
Jae-Woong LEE ◽  
...  
Keyword(s):  
Disintegrin Domain

scholarly journals ADAM9 disintegrin domain activates human neutrophils through an autocrine circuit involving integrins and CXCR2

2015 ◽  
Vol 97 (5) ◽  
pp. 951-962 ◽  
Author(s):  
Rafael S. Amendola ◽  
Ana Carolina B. M. Martin ◽  
Heloísa S. Selistre-de-Araújo ◽  
Heitor A. Paula-Neto ◽  
Roberta Saldanha-Gama ◽  
...  
Keyword(s):  
Human Neutrophils ◽  
Disintegrin Domain

Characterization of the Binding Interaction between ADAMTS13 and von Willebrand Factor (VWF).

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 515-515
Author(s):  
Elaine M. Majerus ◽  
Patricia J. Anderson ◽  
J. Evan Sadler
Keyword(s):  
Proteolytic Activity ◽  
Signal Sequence ◽  
Full Length ◽  
Regulatory Function ◽  
Enzyme Linked Immunosorbent Assay ◽  
Binding Interaction ◽  
Disintegrin Domain ◽  
Adamts13 Deficiency ◽  
Normal Human ◽  
Von Willebrand

Abstract VWF multimers are cleaved into smaller less thrombogenic fragments in plasma by ADAMTS13. Deficiency of ADAMTS13 activity leads to thombotic thrombocytopenic purpura (TTP), a disease characterized by thrombocytopenia, microangiopathic hemolytic anemia, fever, neurological decline, and renal insufficiency. ADAMTS13 is a member of the A Disintegrin and Metalloprotease with ThromboSpondin repeats family that has characteristic motifs including a signal sequence, a propeptide, a catalytic metalloprotease domain, a disintegrin domain, a thrombospondin-1 (TSP1) repeat, a cysteine-rich region, and a spacer domain. These domains are followed in ADAMTS13 by seven additional TSP1 repeats and two C-terminal CUB domains. Previous work has shown that ADAMTS13 truncated after the spacer domain retains proteolytic activity towards VWF, but little is known about the potential role of the additional C-terminal TSP1 and CUB domains in VWF binding or cleavage. We therefore developed an enzyme-linked immunosorbent assay (ELISA)-based system to study ADAMTS13-VWF binding. VWF was immobilized in microtiter wells and incubated with plasma or recombinant ADAMTS13 variants. Bound ADAMTS13 was detected directly by solubilization and Western blotting, or indirectly by ELISA. ADAMTS13 proteolytic activity towards VWF is enhanced by denaturation of VWF with urea or guanidine, but ADAMTS13 bound specifically to VWF without prior denaturation. EDTA increased the binding of ADAMTS13 to VWF and prevented proteolysis of the immobilized VWF. Binding was saturable and time-dependent with maximal binding in two hours. Binding was reversible with a half-time for dissociation of four hours. ADAMTS13 in normal human plasma but not in plasma from a patient with TTP bound immobilized VWF. The stoichiometry of VWF monomers to ADAMTS13 at saturation was approximately 2 (range 1–4) and the Kd of recombinant ADAMTS13 binding to VWF was 12 nM (range 5–26 nM). This Kd for binding is similar to the Km for VWF cleavage of 16 nM determined independently, and both are comparable to the estimated plasma ADAMTS13 concentration of 8 nM. The properties of C-terminally truncated ADAMTS13 constructs suggest a regulatory function for certain domains. Truncation after the 8th TSP1 domain decreased the Kd 2-fold. Further truncation after either the 6th or 7th TSP1 domain increased the Kd 2-fold relative to full-length ADAMTS13. Truncation after the spacer domain gave binding properties indistinguishable from full-length ADAMTS13. Truncation after the metalloprotease domain gave no detectable binding to VWF. Therefore, binding of ADAMTS13 to VWF requires sequences in the cysteine-rich or spacer domains, and is modulated by sequences in at least the 8th TSP1 repeat and the CUB domains.

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