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10.1186/s12858-017-0088-y http://scihub22266oqcxt.onion/10.1186/s12858-017-0088-y C5594493!5594493 !28893174     free     free     free Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28893174 .jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117       BMC+Biochem 2017 ; 18 (1 ): 13 Nephropedia Template TP {{tp|p=28893174 |t=2017. Antiproliferative factor (APF) binds specifically to sites within the cytoskeleton-associated protein 4 (CKAP4) extracellular domain |pdf=|usr=}}{{28893174 }} gab.com Text Antiproliferative factor (APF) binds specifically to sites within the cytoskeleton-associated protein 4 (CKAP4) extracellular domain JO: BMC Biochem http://www.kidney.de/pget.php?&tw=1&pmid=28893174 #FOAvip BACKGROUND: Antiproliferative factor (APF) is a sialoglycopeptide elevated in the urine of patients with interstitial cystitis-a chronic, painful bladder disease. APF inhibits the proliferation of normal bladder epithelial cells and cancer cells in vitro, presumably by binding to its cellular receptor, cytoskeleton associated-protein 4 (CKAP4); however, the biophysical interaction of APF with CKAP4 has not been characterized previously. In this study, we used surface plasmon resonance (SPR) to explore the binding kinetics of the interaction of APF and as-APF (a desialylated APF analogue with full activity) to CKAP4. RESULTS: We immobilized non-glycosylated APF (TVPAAVVVA) to the Fc1 channel as the control and as-APF to Fc2 channel as the ligand in order to measure the binding of CKAP4 recombinant proteins encompassing only the extracellular domain (Aa 127-602) or the extracellular domain plus the transmembrane domain (Aa 106-602). Positive binding was detected to both CKAP4(126-602) and CKAP4(106-602), suggesting that as-APF can bind specifically to CKAP4 and that the potential binding site(s) are located within the extracellular domain. To identify the primary APF binding site(s) within the CKAP4 extracellular domain, deletion mutants were designed according to structural predictions, and the purified recombinant proteins were immobilized on a CM5 chip through amine-coupling to measure as-APF binding activity. Importantly, both CKAP4(127-360) and CKAP4(361-524) exhibited a fast association rate (k (on) ) and a slow dissociation rate (k (off) ), thus generating high binding affinity and suggesting that both regions contribute relatively equally to overall as-APF binding. Therefore, two or more as-APF binding sites may exist within the Aa 127-524 region of the CKAP4 extracellular domain. CONCLUSIONS: We determined that the CKAP4(127-360) and CKAP4(361-524) mutants exhibit improved binding activity to as-APF as compared to the full-length extracellular domain, making it possible to detect low concentrations of as-APF in urine, thereby establishing a foundation for a non-invasive diagnostic assay for IC. Further, these data have revealed novel APF binding site(s) suggesting that targeting this region of CKAP4 to inhibit APF binding may be a useful strategy for treating IC-related bladder pathology. Twit Text FOAVip Antiproliferative factor (APF) binds specifically to sites within the cytoskeleton-associated protein 4 (CKAP4) extracellular domain ????BMC Biochem http://www.kidney.de/pget.php?&tw=1&pmid=28893174 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28893174 #FOAvip English Wikipedia <ref>{{Cite pmid|28893174 }}</ref> Antiproliferative factor (APF) binds specifically to sites within the cytoskeleton-associated protein 4 (CKAP4) extracellular domain #MMPMID28893174 Chavda B ; Ling J ; Majernick T ; Planey SL BMC Biochem 2017[Sep]; 18 (1 ): 13 PMID28893174 show ga BACKGROUND: Antiproliferative factor (APF) is a sialoglycopeptide elevated in the urine of patients with interstitial cystitis-a chronic, painful bladder disease. APF inhibits the proliferation of normal bladder epithelial cells and cancer cells in vitro, presumably by binding to its cellular receptor, cytoskeleton associated-protein 4 (CKAP4); however, the biophysical interaction of APF with CKAP4 has not been characterized previously. In this study, we used surface plasmon resonance (SPR) to explore the binding kinetics of the interaction of APF and as-APF (a desialylated APF analogue with full activity) to CKAP4. RESULTS: We immobilized non-glycosylated APF (TVPAAVVVA) to the Fc1 channel as the control and as-APF to Fc2 channel as the ligand in order to measure the binding of CKAP4 recombinant proteins encompassing only the extracellular domain (Aa 127-602) or the extracellular domain plus the transmembrane domain (Aa 106-602). Positive binding was detected to both CKAP4(126-602) and CKAP4(106-602), suggesting that as-APF can bind specifically to CKAP4 and that the potential binding site(s) are located within the extracellular domain. To identify the primary APF binding site(s) within the CKAP4 extracellular domain, deletion mutants were designed according to structural predictions, and the purified recombinant proteins were immobilized on a CM5 chip through amine-coupling to measure as-APF binding activity. Importantly, both CKAP4(127-360) and CKAP4(361-524) exhibited a fast association rate (k (on) ) and a slow dissociation rate (k (off) ), thus generating high binding affinity and suggesting that both regions contribute relatively equally to overall as-APF binding. Therefore, two or more as-APF binding sites may exist within the Aa 127-524 region of the CKAP4 extracellular domain. CONCLUSIONS: We determined that the CKAP4(127-360) and CKAP4(361-524) mutants exhibit improved binding activity to as-APF as compared to the full-length extracellular domain, making it possible to detect low concentrations of as-APF in urine, thereby establishing a foundation for a non-invasive diagnostic assay for IC. Further, these data have revealed novel APF binding site(s) suggesting that targeting this region of CKAP4 to inhibit APF binding may be a useful strategy for treating IC-related bladder pathology. |Amino Acid Sequence [MESH] |Binding Sites [MESH] |Cell Line, Tumor [MESH] |Extracellular Space/*metabolism [MESH] |Glycoproteins/chemistry/*metabolism [MESH] |Humans [MESH] |Intercellular Signaling Peptides and Proteins [MESH] |Kinetics [MESH] |Membrane Proteins/*chemistry/genetics/*metabolism [MESH] |Models, Molecular [MESH] |Protein Binding [MESH] |Protein Domains [MESH] |Sequence Deletion [MESH] |Substrate Specificity [MESH]Antiproliferative factor (APF) binds specifically to sites within the (epmc).pdf DeepDyve Pubget Overpricing