sheep anti matriptase (R&D Systems)
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Sheep Anti Matriptase, supplied by R&D Systems, used in various techniques. Bioz Stars score: 92/100, based on 39 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/sheep anti matriptase/product/R&D Systems
Average 92 stars, based on 39 article reviews
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1) Product Images from "Detection of Active Matriptase Using a Biotinylated Chloromethyl Ketone Peptide"
Article Title: Detection of Active Matriptase Using a Biotinylated Chloromethyl Ketone Peptide
Journal: PLoS ONE
doi: 10.1371/journal.pone.0077146
Figure Legend Snippet: (A) Schematic structure of the biotin-RQRR-CMK peptide inhibitor. (B) The reactivity of biotin-RQRR-CMK was tested after 180 min of pre-incubation at 37°C (diamonds) or without preincubation (crosses). 0.2 µM matriptase SPD was incubated for 10 min at 37°C with (diamonds and crosses) or without (squares) 50 µM biotin-RQRR-CMK before addition of the chromogenic substrate to a final concentration of 300 µM. (C) The stability of 5 nM biotin-RQRR-CMK was further tested after the time points 0 (crosses), 60 (circles), 120 (stars), and 180 min (diamonds) of pre-incubation at 37°C and compared to a control not containing biotin-RQRR-CMK (squares). As described above, 0.2 nM matriptase SPD was added to each sample and incubated for 10 min at 37°C followed by addition of the chromogenic substrate to a final concentration of 300 µM. In all cases, the enzymatic activity of SPD was monitored by conversion of the chromogenic substrate (S2288). Each plot shows the change in optical density at 405 nm of the reaction mixture as a function of reaction time. The presence of active protease results in a continued release of a yellow cleavage product resulting in a linear color development in agreement with a pseudo 1 st order reaction due to the high molar excess of substrate to protease. Results shown are representative of 3 independent experiments.
Techniques Used: Incubation, Concentration Assay, Activity Assay
Figure Legend Snippet: (A) Eleven days post-confluent Caco-2 cells grown on Transwell filters were labeled with 50 µM biotin-RQRR-CMK from the basolateral side for the times indicated (2–180 min) at 37°C (lanes 3–6) or for 180 min at 4°C (lane 7). As a measure of the steady state level of matriptase, membrane proteins on the basolateral plasma membrane of filter-grown Caco-2 cells were labeled by incubation with S-NHS-SS-biotin at 4°C for 30 min (lane 1). As a negative control, cells were labeled from the basolateral side with 50 µM control peptide; biotin-RQRR (lane 2). All cells were lysed and biotinylated proteins were precipitated using streptavidin-coated resin and were analyzed by non-reducing SDS-PAGE and Western blotting using the monoclonal matriptase antibody; M32. A tenth of the surface biotinylated sample was loaded (lane 1); whereas total sample volume was loaded for the other samples (lanes 2-7). (B) Caco-2 cells grown on Transwell filters were labeled with the biotin-RQRR-CMK peptide inhibitor from either the apical (lanes 1, 4, and 7) or the basolateral (lanes 2, 5, and 8) side for 180 min at either 4°C or 37°C. An overexposure of lanes 1–3 is shown in lanes 7–9. As a negative control, cells were labeled from the basolateral side with a peptide corresponding to the inhibitory peptide but lacking the CMK moiety (CTRL, lanes 3, 6, and 9). Cells were lysed and the lysates of multiple filters were pooled. Biotinylated proteins were precipitated using streptavidin-coated resin and the streptavidin pull downs were released by boiling in SDS-PAGE samples buffer and analyzed by SDS-PAGE and Western blotting using the monoclonal M32 antibody. Positions of the molecular weight markers (kDa) are indicated on the left. Results shown are representative of 3 independent experiments.
Techniques Used: Labeling, Incubation, Negative Control, SDS Page, Western Blot, Molecular Weight
Figure Legend Snippet: (A) Eleven days post-confluent filter-grown Caco-2 cells were treated with either a physiologically phosphate buffer pH 6.0 for 20 min (lanes 2, 4, 6, and 8) from both the apical and the basolateral side or left untreated (lanes 1, 3, 5, and 7). Cells were lysed and lysates were analyzed by Western blotting using antibodies against total matriptase (M24; lanes 1 and 2), matriptase SPD (IM1014; lanes 5 and 6), matriptase-HAI-1 complex (M69; lanes 3 and 4) and HAI-1 (lanes 7 and 8). Samples in lanes 1–4, 7, and 8 were not boiled to avoid dissociation of matriptase-HAI-1 complexes, while samples in lanes 5 and 6 were boiled and reduced to dissociate the S-S bridged SPD from the stem domain of activated matriptase in order to distinguish between the SEA domain-cleaved form (70 kDa) and the Arg614 cleaved form (25–30 kDa). Treatment with phosphate buffer pH 6.0 and DTT is indicated by +/−. Positions of the molecular weight markers (kDa) are indicated on the left. (B) A solution of 0.2 µM SPD was incubated for 10 min at 37°C with (crosses) or without (squares) 50 µM biotin-RQRR-CMK before addition the chromogenic substrate to a final concentration of 300 µM. All experiments were performed in 20 mM citric acid buffer pH 6.0, 140 mM NaCl and 0.1% BSA at 37°C. Results shown are representative of 3 independent experiments.
Techniques Used: Western Blot, Molecular Weight, Incubation, Concentration Assay
Figure Legend Snippet: Eleven days post-confluent Caco-2 cells grown on Transwell filters were labeled with 50 µM biotin-RQRR-CMK from the basolateral side for 180 min at 37°C. As a negative control, cells were labeled from the basolateral side with 50 µM control peptide; biotin-RQRR (CTRL), under the same conditions. Labeled proteases were precipitated using streptavidin-coated resin and the streptavidin pull downs were analyzed by reducing SDS-PAGE and Western blotting using the IM1014 antibody raised against matriptase SPD. Positions of the molecular weight markers (kDa) are indicated on the left and position of SEA domain-cleaved zymogen matriptase and matriptase SPD is indicated on the right. Results shown are representative of 3 independent experiments.
Techniques Used: Labeling, Negative Control, SDS Page, Western Blot, Molecular Weight
Figure Legend Snippet: Murine keratinocytes were isolated from newborn wildtype (WT) or matriptase-deficient pups (KO) and cultured on collagen-coated plastic. The cells were grown until sub-confluent and then labeled with S-NHS-SS-biotin (lanes 1, 4, 7, and 10), or with 50 µM biotin-RQRR-CMK (lanes 2, 5, 8, and 11), or with 50 µM control peptide; biotin-RQRR (lanes 3, 6, 9, and 12). Cells were lysed and analyzed on Western blot (lanes 7–12). The remaining lysates were precipitated using streptavidin-coated resin, released from the beads by boiling under non-reducing conditions and lysates were analyzed by SDS-PAGE and Western blotting using the matriptase antibody AF3946. Results shown are representative of 2 independent experiments.
Techniques Used: Isolation, Cell Culture, Labeling, Western Blot, SDS Page
![Fig. 2. Identification of Trop2 as a target for <t>matriptase.</t> (A) Sequence alignment of a part of human EpCAM and human Trop2 protein sequences. Scissors denote reported N-terminal cleavage site in human EpCAM between Arg80 and Arg81 [19]. It corresponds to Arg87 and Thr88 (boxed) in human Trop2 which were selected for generating alanine substitution mutants. (The conserved residues between the two proteins are indicated by asterisks below the sequence.) Amino acid numbering is including the signal peptide. (B) Expression of WT Trop2-HA and the indicated alanine substitution mutants. Total cell lysate from HEK293 cells transiently transfected with either WT Trop2- HA or R87A Trop2-HA or T88A Trop2-HA was immunoblotted before (left) and after PNGase treatment (right) using anti-HA antibody (upper panel) and anti-GAPDH antibody (lower panel) (C) Cell surface localization of Trop2 (green) in nonpermeabilized HEK293 cells transiently expressing the indicated Trop2-HA constructs visualized by indirect immunofluorescence using anti-Trop2 ECD antibody. DAPI (blue) was used as a nuclear stain. Bar = 10 µm. HEK293 cells transfected with an EV served as a negative control. (D) HEK293 cells were cotransfected with the indicated amount of WT Trop2-HA and either WT matriptase (Mat-HA) or inactive matriptase (Mat-M-HA) constructs. Cell lysates were prepared 48 h post-transfection followed by immunoblotting with anti-HA antibody to detect matriptase as well as Trop2 protein. GAPDH is the loading control (lower panel). Filled triangle and hollow triangle represents full-length Trop2 and DN-Trop2, respectively. (E) Immunoblot showing matriptase expression in the total cell lysates of the indicated cell lines using anti-matriptase antibody (upper panel). Expression of GAPDH in each cell line serves as the loading control (lower panel).](https://pub-med-unpaywalled-images-cdn.bioz.com/pub_med_ids_ending_with_1920/pm32761920/pm32761920__page6_image1.jpg)
