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Variant of bpifb4 protein

A technology of protein variants and variants, applied in the field of BPIFB4 protein variants, can solve problems such as loss of protein activity

Active Publication Date: 2019-03-08
LGV1 SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These biological properties depend on the presence of four specific amino acids at positions 229, 281, 488, and 494 in the protein, because substitutions at any of these positions with different amino acids result in loss of protein activity

Method used

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  • Variant of bpifb4 protein
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  • Variant of bpifb4 protein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Identification of the VTFThBPIFB4 protein in three independent populations

[0059] A recently published Genome Wide Association Study (GWAS) of Southern Italian Centenarians (SIC) has identified several genetic variants associated with longevity in individuals (Malovini et al., Rejuvenation Research 2011; 14(3), pp. 283-291).

[0060] To confirm the first 4 changes reported in this study (p-4 ), replicated in the first replication cohort recruited for the German Centenary Study (Keidorp et al; Aging Cell 2011; Vol. 10, pp. 622-8), The first replicate cohort comprised 1447 long-lived individuals (LLI) (age range 95 to 110 years, mean age 98.8 years) and 1029 younger controls (age range 60 to 75 years, mean age was 66.8 years). As a result, two non-synonymous single-nucleotide polymorphisms (single-nucleotide polymorphism, SNP) rs2070325 and rs571391 and two intron markers rs7583529 and rs285097 have been tested by Taqman analysis, the two intron Markers ...

Embodiment 2

[0072] Example 2: Haplotyping of the BPIFB4 locus

[0073] Haplotype analysis revealed a strong linkage disequilibrium (LD) pattern in the BPIFB4 genomic locus, which defined regions highly enriched in non-synonymous SNPs (Fig. S1 in the Supplementary Appendix). The rs2070325 variant (Ile229Val) of BPIFB4 tags rs2889732 (Asn288Thr), rs11699009 (Leu488Phe) and rs11696307 (Ile494Thr).

[0074] I-TASSER program by homology modeling (REF: Ambrish Roy, Alper Kucukural, Yang Zhang. I-TASSER: a unified platform for automated protein structure and function prediction. Nature Protocols, Vol. 5, 725-738 (2010).) And the protein BPI (code 1EWF) from PDB was used as a template to predict the three-dimensional structure of human BPIFB4. All models were considered in the visual structure analysis with the program PyMOL version 1.2r3pre, LLC (Molecular Graphics System) to carry out. The above analysis revealed that both Ile268Val and Asn320Thr are located at putative protein-protein in...

Embodiment 3

[0076] Example 3: Reactivity of isolated blood vessels to INFT hBPIFB4 and VTFT hBPIFB4

[0077] To determine the effect of the specific BPIFB4 variants identified on vascular function, we studied ex vivo transfection with pRK5 vectors encoding VTFThBPIFB4 or proteins that differ from VTFT hBPIFB4 in that they exhibit multiple substitutions for four relevant amino acids Effects on mouse mesenteric blood vessels, the protein being: INFT hBPIFB4 having the amino acid sequence of SEQ ID NO: 3, which differs from VTFT hBPIFB4 in that it contains isoleucine at positions 229 and 281 and day Paragine; VNFT hBPIFB4 with the amino acid sequence of SEQ ID NO: 4, which differs from VTFT hBPIFB4 in that it contains asparagine at position 281; ITFT hBPIFB4 with the amino acid sequence of SEQ ID NO: 5, which is different from VTFT The difference of hBPIFB4 is that it contains isoleucine at position 229; VTLI hBPIFB4 having the amino acid sequence of SEQ ID NO: 6, which differs from VTFT h...

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Abstract

The present invention relates to variants of the BPIFB4 (bactericidal / permeability-increasing protein family B, member 4) protein and their use for the treatment of conditions involving impaired nitric oxide signaling.

Description

technical field [0001] The present invention relates to variants of the BPIFB4 protein (bactericidal / permeability-increasing protein family B, member 4) and their use in the treatment of pathologies associated with impaired eNOS and endothelial dysfunction caused by NO-mediated vasodilation the use of. Background technique [0002] Human BPIFB4 (also known as C20orf186; RY2G5; LPLUNC4) is a secreted protein member of the BPI / LBP / PLUNC-like family that has been implicated in host defense processes against bacteria. This protein exists in two different isoforms of different lengths with amino acid sequences of 575 (Acc.P-59827-2) and 613 (Acc.EAW76337.1) amino acids (Bingle CD et al., Biochem Soc Trans. (2011) 39(4): 977-83; Andrault J.-B et al., Genomics (2003) 82: 172-184; Bingle C.D et al., Hum. Mol. Genet. (2002) 11: 937-943; Bingle C.D et al., Protein Sci . (2004) 13: 422-430). [0003] For this protein, several single nucleotide polymorphisms have been described at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K14/47
CPCC07K14/47A61K38/00C07K14/4742A61P11/00A61P13/12A61P15/00A61P15/10A61P25/00A61P25/28A61P27/02A61P27/06A61P27/12A61P29/00A61P35/00A61P3/06A61P43/00A61P7/02A61P9/00A61P9/10A61P9/12A61P3/10A61K38/1751C12N15/86C12N2710/10343C12N2750/14143C07K2319/20C12N2015/8518C12N15/81
Inventor 安尼巴莱·亚历山德罗·普卡察尔米内·韦基奥内
Owner LGV1 SRL
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