Recombinant Human CD11b Protein

Name: Recombinant Human CD11b Protein
Brand: Beta LifeScience
SKU: BLA-10818P
Availability: InStock

Collections: Cluster of differentiation (cd) proteins, Featured cd protein molecules, Recombinant proteins

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Product Overview

Host Species	Human
Accession	P11215
Synonym	antigen CD11b (p170) Antigen CD11b p170 CD11 antigen like family member B CD11 antigen-like family member B CD11b CD11b/CD18 CD49d Cell surface glycoprotein MAC-1 subunit alpha Complement component 3 receptor 3 subunit Complement Component Receptor 3 Alpha Complement receptor type 3 Complement receptor type 3, alpha subunit CR 3 alpha chain CR 3 alpha chain (CR3A) CR-3 alpha chain CR3 CR3A F730045J24Rik Integrin Alpha M Integrin alpha M chain Integrin alpha-M Integrin beta 2 alpha subunit Integrin subunit alpha M integrin, alpha M (complement component 3 receptor 3 subunit) ITAM_HUMAN ITGAM Leukocyte adhesion receptor MO1 Ly-40 MAC 1 Mac-1a MAC1 Mac1, alpha subunit MAC1A Macrophage antigen alpha polypeptide MGC117044 Mo1 Mo1, alpha subunit MO1A Neutrophil adherence receptor Neutrophil adherence receptor alpha M subunit SLEB6
Description	Recombinant Human CD11b Protein was expressed in E.coli. It is a Protein fragment
Source	E.coli
Molecular Weight	29 kDa
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Formulation	Lyophilised
Stability	The recombinant protein samples are stable for up to 12 months at -80°C
Reconstitution	See related COA
Unit Definition	For Research Use Only
Storage Buffer	Shipped at 4°C. Store at -20°C.

Target Details

Target Function	Integrin ITGAM/ITGB2 is implicated in various adhesive interactions of monocytes, macrophages and granulocytes as well as in mediating the uptake of complement-coated particles and pathogens. It is identical with CR-3, the receptor for the iC3b fragment of the third complement component. It probably recognizes the R-G-D peptide in C3b. Integrin ITGAM/ITGB2 is also a receptor for fibrinogen, factor X and ICAM1. It recognizes P1 and P2 peptides of fibrinogen gamma chain. Regulates neutrophil migration. In association with beta subunit ITGB2/CD18, required for CD177-PRTN3-mediated activation of TNF primed neutrophils. May regulate phagocytosis-induced apoptosis in extravasated neutrophils. May play a role in mast cell development. Required with TYROBP/DAP12 in microglia to control production of microglial superoxide ions which promote the neuronal apoptosis that occurs during brain development.
Subcellular Location	Cell membrane; Single-pass type I membrane protein. Membrane raft; Single-pass type I membrane protein.
Protein Families	Integrin alpha chain family
Database References	HGNC: 6149 OMIM: 120980 KEGG: hsa:3684 STRING: 9606.ENSP00000441691 UniGene: Hs.172631
Associated Diseases	Systemic lupus erythematosus 6 (SLEB6)
Tissue Specificity	Predominantly expressed in monocytes and granulocytes. Expressed in neutrophils (at protein level).

Gene Functions References

A significant reduction of CD11b expression on monocytes and granulocytes, as a sign of reduced cellular inflammation, was achieved by treatment of atrial fibrillation using pulmonary vein isolation. PMID: 28073885
Expression of Mac-1 on the surface of human embryonic kidney (HEK) 293 cells induced their adhesion and migration to PTN. Accordingly, PTN promoted Mac-1-dependent cell spreading and initiated intracellular signaling manifested in phosphorylation of Erk1/2. PMID: 28939773
CD11b rs1143679 polymorphism appears to be associated with risk for SLE in the Han Chinese population, and may play an important role in the development of lupus nephritis. PMID: 29207897
alphaMbeta2 uses its alphaI domain to bind iC3b at the thioester domain and simultaneously interacts through a region near the alphaM beta-propeller and beta2 betaI domain with a region of the C3c moiety near the C345C domain. PMID: 28292891
Up-regulation of granulocyte and monocyte CD11b during plasma separation was C5-dependent. PMID: 29575196
This study shown the ITGAM expression in Microglia and Astrocytes in stroke, Alzheimer's disease, and Lewy body dementia. PMID: 28398520
CD11b expression on polymorphonuclear leukocytes from patients with ankylosing spondylitis stimulated with lipopolysaccharide is not different to that of healthy controls. PMID: 24373176
The use of CD33(+)CD11b(+)HLA-DR(-) cells as a predictive and prognostic biomarker. PMID: 27178742
Bone marrow mesenchymal stromal cells induce the rapid differentiation of CD11b+ myeloid cells from bone marrow progenitors, and such an activity requires the expression of nitric oxide synthase-2. PMID: 28183849
demonstrate for the first time a dependency of monocyte-platelet aggregates and CD11b expression on monocytes in the presence of atrial fibrillation (AF) and support the notion of a close relationship between AF, thrombogenesis and inflammation PMID: 26763077
Increased CD11b+ and CD200+ monocytes in those with a strong presence of BVN indicate that BVN development may be associated with retinal injury and a VEGF-mediated process that is either reflected or propelled by systemic changes in monocytes. PMID: 29049725
This study, we provide evidence supporting a crucial pathogenic role for alphaM-integrin (CD11b) in acute inflammatory demyelinating polyradiculoneuropathy mononuclear leukocyte trafficking. PMID: 27460017
TLR-stimulated macrophages from CD11B SNP carriers showed increased basal expression of IFN regulatory factor 7 (IRF7) and IFN-beta, as well as increased nuclear exclusion of FOXO3, which was suppressed by LA1-dependent activation of CD11b. PMID: 28263189
FRbeta as a novel CD11b/CD18 regulator for trafficking and homing of a subset of macrophages on collagen. PMID: 27534550
this study shows that upregulation of CD11b after stimulation with IL-8 is more pronounced in adults than in neonates, whereas fMLP induces changes in receptor expression that are of the same magnitude in neutrophils from neonates as from adults PMID: 27606963
Ingestion of amino acid supplement did not influence CD11b expression. PMID: 27384580
This metaanalysis indicates that polymorphisms in the pathways of immune complex clearance, such as the FcgammaRIIIa, FcgammaRIIIb, and ITGAM genotypes, are potential susceptibility genes for neuropsychiatric systemic lupus erythematosus. PMID: 26773105
Monocyte-platelet aggregates and CD11b expression on monocytes and granulocytes are increased in atrial fibrillation patients with proven thrombus formation. They seem to be appropriate biomarkers for stratification of thromboembolic risk in patients with AF. PMID: 26411420
CD11b immunophenotyping identifies inflammatory profiles in the mouse and human lungs. PMID: 26422753
There is direct interaction between C3(H2O) and CD11b. Contact-activated C3(H2O) is a novel ligand for CD11b/CD18 that mediates platelet-PMN complex formation and the binding of platelet-derived microparticles to PMNs. PMID: 26293614
increased in neonates with abnormal neuroimaging and/or severe neonatal encephalopathy PMID: 25655529
Data show that secreted aspartic protease 2 (Sap2) of Candida albicans inactivates human macrophage complement factor H (factor H), factor H-receptors CD11b/CD18 and CD11c/CD18. PMID: 26306739
we confirmed the similarities between epithelial ovarian cancer and fallopian tube, normal and adenocarcinoma using FOLR1, FOLR2, CD68 and CD11b markers PMID: 25971554
While total surface expression of CD11b and L-selectin on neutrophils was largely unaffected PMID: 26361072
CD11b expression level might be considered a prognostic biomarker for Acute Myeloid Leukemia patients. [meta-analysis] PMID: 26309131
analysis of neutrophil and monocyte expression of toll-like receptor 4, CD11b and reactive oxygen intermediates, and correlation with neuroimaging outcomes in preterm infants PMID: 25826119
The rs1143679 polymorphism is associated with systemic lupus erythematosus susceptibility in different ethnic groups and with lupus nephritis in Europeans. No association was found with rheumatoid arthritis. [Meta-Analysis] PMID: 25315704
the results identify dynorphins A and B as novel ligands for Mac-1. PMID: 26036990
A novel expanding CD11b+ conventional dendritic cell subpopulation dominates the infiltrating renal inflammatory milieu, localizing to the glomeruli, in lupus nephritis. PMID: 26512111
Modification of Levels of Adhesion Molecule Expression of Human Innate Immune Cells by Glycopolymers of Marine Bacteria PMID: 26852488
study supports the crucial role of GABP in myeloid cell differentiation and identified ITGAM/CD11b as a novel GABP target gene PMID: 26170143
Data indicate that Candida albicans beta-Glucan induces high IL-1 receptor antagonist (IL-1Ra) levels, independently from Dectin-1/complement receptor 3 (CR3). PMID: 25461401
A novel association of common variable immunodeficiency have been found with rare variants at the FUS/ITGAM (CD11b) locus on 16p11.2. PMID: 25678086
role of CD11b/CD18 in priming of human leukocytes by endotoxin glycoforms from Escherichia coli PMID: 25365491
Il-6-induced recruitment of CD11b+ CD14+ HLA-DR- myeloid-derived suppressor cells is associated with progression and poor prognosis in squamous cell carcinoma of the esophagus. PMID: 25238263
Results show the functional importance of integrin alpha M (ITGAM) in systemic lupus erythematosus (SLE) pathogenesis through impaired phagocytosis. PMID: 24886912
Examination of CR3 ( CD11b/CD18)mutant variants and mass spectrometry analysis of the N-glycosylation pattern of CR3 revealed that N-glycans located in the C-terminal part of the CD11b subunit are involved in binding and cytotoxic activity of CyaA. PMID: 25554420
newly revealed recognition specificity of alpha(M)beta2 toward unfolded protein segments and cationic proteins and peptides suggests that alpha(M)beta2 may serve as a previously proposed "alarmin" receptor with important roles in innate host defense PMID: 25613106
The HNA-1b allotype influences the Fc gamma RIIIb cooperation with Fc gamma RIIa, but not with CR3. PMID: 24945596
The altered expression levels of ITGAM and FCgammaRIIIA mRNA in systemic lupus erythematosus patients and their correlations with clinical data suggest that ITGAM and FCgammaRIIIA may play a role in this disease. PMID: 23708937
The transcript levels of ITGAM significantly decreased for the systemic lupus erythematosus risk allele (A) relative to the non-risk allele (G), in a dose-dependent fashion. PMID: 24608226
A new genome-wide significant association between ITGAM-ITGAX and IgA nephropathy. PMID: 25305756
A negative correlation was found between CD11b percentage and postinfarct left ventricular ejection fraction. PMID: 25136078
hnRNP K in PU.1-containing complexes recruited at the CD11b promoter: a distinct role in modulating granulocytic and monocytic differentiation of AML-derived cells. PMID: 25005557
This suggests that FcgammaRIIIb signals in association with macrophage-1 Ag. PMID: 25024378
Although CD11b was more frequently expressed in blast cells of patients with intermediate and unfavorable cytogenetic risk groups, this feature did not translate into different clinical outcome. PMID: 24782118
circulating trisomy 12 CLL cells also have increased expression of the integrins CD11b, CD18, CD29, and ITGB7, and the adhesion molecule CD323. PMID: 24829201
integrin alpha9beta1/CD11B levels in circulating neutrophils are significantly elevated in pneumonia patients PMID: 23257917
genetic polymorphism is associated with systemic lupus erythematosus in Brazilian patients PMID: 24269694
Complement receptor 3 (CR3) inhibition impairs phagocytosis of serum-opsonized zymosan but has little impact on phagocytosis of unopsonized zymosan in the absence or presence of lipopolysaccharide. PMID: 24726062

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.