Rotein. In view of these facts and also as observed in the structures of the complexes of CPGRP-S with various PAMPs, the glycan moieties indeed appeared to be more relevant elements for the recognition by CPGRP-S at the C contact. An examination of intermolecular interactions between CPGRP-S and SA and between CPGRP-S and LPS clearly showed that both ligands bound to the protein strongly and independently. As there is no plausible site in CPGRP-S for enzymatic activity, the binding appears to be the only mode ofWide Spectrum Antimicrobial Role of Camel PGRP-Saction. Thus CPGRP-S may sequester bacteria and deprive it of cell-cell communication as well as it may prevent the bacterial contact with the matrix around it. Such an isolation of bacterial cells may eventually cause its death. This process of bacterial killing here appears to be different from that of antibacterial peptides such as defensins that kill bacteria by permeabilization of cell membranes [25], peptidoglycan lytic enzymes which also kill bacteria by causing membrane permeabilization [26]. However, it may have some similarity with the action of antibiotics such as penicillin that may eventually destroy the cell wall of bacteria by inhibiting its synthesis [27]. Thus, the kinetics of bacterial killing by CPGRP-S may be somewhat similar to that 
of antibiotics and because of this similarity CPGRP-S may also be termed as a protein antibiotic.AcknowledgmentsTPS thanks the Department of Biotechnology (DBT), Ministry of science and Technology, New Delhi for the award of Distinguished Biotechnology research professorship to him. PS thanks Department of Science and Technology for INSPIRE-Faculty award to him.Author ContributionsConceived and designed the experiments: PS SS TPS. Performed the experiments: PS DD MS. Analyzed the data: PS SS TPS. Contributed reagents/materials/analysis tools: PK SY. Wrote the paper: SS TPS.
Aortic aneurysm and dissection (AAD) account for almost 11,000 deaths in the United States each year [1]. Despite improvements in diagnostic and therapeutic techniques for AAD, the mortality rate remains high. Characterized by aortic medial degeneration, AAD presents as the progressive loss of smooth muscle cells (SMCs) [2] and the destruction of extracellular matrix [3]. Medial degeneration of the aorta leads to progressive aortic dilatation, and ultimately, to dissection or aneurysm rupture [4]. The overproduction of destructive factors plays a significant role in aortic degeneration and AAD development. In addition, impaired aortic protection (resistance to tissue destruction) and insufficient aortic repair may contribute to the process. However, the signaling mechanisms that control aortic protection and repair in AAD are poorly understood.Notch signaling plays an important role in regulating tissue development and homeostasis [5,6,7] by controlling cell fate and specifying tissue patterning [8,9,10]. The Notch signaling pathway is activated by the binding of Delta-like or Jagged ligands to Notch Epigenetics receptors, and this binding triggers the ADAM protease-mediated cleavage of the Notch Autophagy receptor extracellular domain. The subsequent c-secretase ediated cleavage of the Notch receptor releases the Notch1 intracellular domain (NICD), which translocates into the nucleus and regulates the expression of downstream genes [11], such as Hes1 [12]. Specifically, Notch signaling is important in controlling vascular smooth muscle cell (VSMC) differentiation [13,14], and the pat.Rotein. In view of these facts and also as observed in the structures of the complexes of CPGRP-S with various PAMPs, the glycan moieties indeed appeared to be more relevant elements for the recognition by CPGRP-S at the C contact. An examination of intermolecular interactions between CPGRP-S and SA and between CPGRP-S and LPS clearly showed that both ligands bound to the protein strongly and independently. As there is no plausible site in CPGRP-S for enzymatic activity, the binding appears to be the only mode ofWide Spectrum Antimicrobial Role of Camel PGRP-Saction. Thus CPGRP-S may sequester bacteria and deprive it of cell-cell communication as well as it may prevent the bacterial contact with the matrix around it. Such an isolation of bacterial cells may eventually cause its death. This process of bacterial killing here appears to be different from that of antibacterial peptides such as defensins that kill bacteria by permeabilization of cell membranes [25], peptidoglycan lytic enzymes 
which also kill bacteria by causing membrane permeabilization [26]. However, it may have some similarity with the action of antibiotics such as penicillin that may eventually destroy the cell wall of bacteria by inhibiting its synthesis [27]. Thus, the kinetics of bacterial killing by CPGRP-S may be somewhat similar to that of antibiotics and because of this similarity CPGRP-S may also be termed as a protein antibiotic.AcknowledgmentsTPS thanks the Department of Biotechnology (DBT), Ministry of science and Technology, New Delhi for the award of Distinguished Biotechnology research professorship to him. PS thanks Department of Science and Technology for INSPIRE-Faculty award to him.Author ContributionsConceived and designed the experiments: PS SS TPS. Performed the experiments: PS DD MS. Analyzed the data: PS SS TPS. Contributed reagents/materials/analysis tools: PK SY. Wrote the paper: SS TPS.
Aortic aneurysm and dissection (AAD) account for almost 11,000 deaths in the United States each year [1]. Despite improvements in diagnostic and therapeutic techniques for AAD, the mortality rate remains high. Characterized by aortic medial degeneration, AAD presents as the progressive loss of smooth muscle cells (SMCs) [2] and the destruction of extracellular matrix [3]. Medial degeneration of the aorta leads to progressive aortic dilatation, and ultimately, to dissection or aneurysm rupture [4]. The overproduction of destructive factors plays a significant role in aortic degeneration and AAD development. In addition, impaired aortic protection (resistance to tissue destruction) and insufficient aortic repair may contribute to the process. However, the signaling mechanisms that control aortic protection and repair in AAD are poorly understood.Notch signaling plays an important role in regulating tissue development and homeostasis [5,6,7] by controlling cell fate and specifying tissue patterning [8,9,10]. The Notch signaling pathway is activated by the binding of Delta-like or Jagged ligands to Notch receptors, and this binding triggers the ADAM protease-mediated cleavage of the Notch receptor extracellular domain. The subsequent c-secretase ediated cleavage of the Notch receptor releases the Notch1 intracellular domain (NICD), which translocates into the nucleus and regulates the expression of downstream genes [11], such as Hes1 [12]. Specifically, Notch signaling is important in controlling vascular smooth muscle cell (VSMC) differentiation [13,14], and the pat.
