Recombinant Feline CD4 Protein

Cat. No.: rp175914

GRADE & PURITY Animal Free, Carrier Free, Azide Free, His Tag, PBS Only, ≥95%(SDS-PAGE)

Expression System

HEK293

Accession #

P79355

Protein Tag

C-His

Expression system

HEK293

Endotoxin Concentration

<1.0 EU/μg

Overview

Purity:>95%, by SDS-PAGE visualized with Coomassie® Blue Staining.
Description：
CD4, also known as L3T4, T4, and W3/25, is an approximately 55 kDa type I transmembrane glycoprotein that is expressed predominantly on thymocytes and a subset of mature T lymphocytes. It is a standard phenotype marker for the identification of T cell populations. Mature feline CD4 consists of a 388 amino acid (aa) extracellular region containing four immunoglobulin-like domains, a 22 aa transmembrane segment, and a 40 aa cytoplasmic domain. Within the ECD, feline CD4 shares 70%, 58%, 50%, and 48% aa sequence identity with canine, human, mouse and rat CD4, respectively. CD4 is expressed along with CD8 on double positive T cells during their development in the thymus. Either CD4 or CD8 expression is then lost, giving rise to single positive (SP) CD4+ or CD8+ mature T cells. CD4+ SP cells, also known as T helper cells, further differentiate into multiple subsets of CD4+ cells including Th1, Th2, Th17, Tfh, and Treg cells which regulate humoral and cellular immunity. CD4 is reexpressed on circulating CD8+ T cells upon activation and contributes to their cytotoxic effector activity. In human, CD4 is additionally expressed on macrophages, neutrophils, monocytes, NK cells, and neurons and glial cells in the brain. Similar CD4 distribution between species cannot be assumed as demonstrated by its presence on macrophages in human and rat but not in mouse. CD4 binds directly to MHC class II molecules on antigen presenting cells. This interaction contributes to the formation of the immunological synapse which is focused around the TCR-MHC class II-antigenic peptide interaction. Palmitoylation of two cysteine residues in the cytoplasmic tail of CD4 promotes the localization of CD4 in lipid rafts and its ability to augment TCR signaling via activation of the tyrosine kinase Lck. CD4 also functions as a chemotactic receptor for IL-16 and, in human, as a coreceptor for the gp120 surface glycoprotein of HIV-1.

Specifications

Product Name

Recombinant Feline CD4 Protein

Synonyms

CD_antigen: CD4 | CD4 antigen (p55) | CD4 antigen | CD4 molecule | CD4 receptor | CD4 | CD4mut | T-cell surface antigen T4/Leu-3 | T-cell surface glycoprotein CD4

Grade

Animal Free, Azide Free, Carrier Free, His Tag, PBS Only

Specifications & Purity

Animal Free, Carrier Free, Azide Free, His Tag, PBS Only, ≥95%(SDS-PAGE)

Endotoxin Concentration

<1.0 EU/μg

Expression System

HEK293

Amino Acids

1-412 aa

Sequence

MNQGAVFRHLLLVLQLVMLKAAVPQGKEVVLGKAGGTAELPCQASQKKYMTFTWRLSSQVKILESQHSSLCLTGSSKLKTRFESKKILWDQGSFPLVIKSLQVADSGIYTCEVENKKREVELLVFGLTAKVDPSGSGGSSSSSTSTSTSIYLLQGQSLTLTLESPSSSNPSVQWKGPGNKSKSGVHSLSLSQLELQESGTCTCTVSQSQKTLVFNTNILVLAFRKVSNTVYAKEGEQVEFSFPLNFEDENLMGNLRWKAEGAPSSLLWISFTLKNKQLSVKEVDPYSKLQMMDSLPLRFTLPNVLSRYAGSGNLTLVLDKGQLQQEVKLVVMRVTQSGNNLTCEVLGPTSPELTLSLKLKGQAAKVSKQQKMVRVEDAEAGTWQCLLSHKDKVLLASKAEVLPPVLTRTWTNHHHHHH

Protein Tag

C-His

Accession #

P79355

Predicted molecular weight

43.3 kDa

SDS-PAGE

39.1-54.2 kDa, under reducing conditions; 37.0-52.4 kDa, under non-reducing conditions

Molecule Type

Protein

Storage and Shipping

Shape

Lyophilized

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute at 1.0 mg/mL in sterile distilled water. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.

Storage

Store at -20°C,Avoid repeated freezing and thawing

Shipped In

Ice chest + Ice pads

Stability And Storage

Store at -20°C for 1 year. Avoid freeze / thaw cycle.

Images

SDS-PAGE: Recombinant Feline CD4 Protein (rp175914)

Recombinant Feline CD4 Protein (rp175914) - SDS-PAGE
3 μg/lane of Recombinant Feline CD4 Protein was resolved with SDS-PAGE under reducing (R) and non-reducing (N) conditions and visualized by Coomassie® Blue staining, showing a band at 39.1-54.2 kDa under reducing conditions and 37.0-52.4 kDa under non-reducing conditions.