Complement Factor B (CFB) Recombinant Protein | CFB recombinant protein

Recombinant Complement Factor B (CFB)

Cat. Num. AAA2010327

• Gene Names: CFB; BF; FB; BFD; GBG; CFAB; PBF2; AHUS4; FBI12; H2-Bf; ARMD14
• Applications: SDS-Page, Western Blot, ELISA, Immunoprecipitation
• Purity: > 95%
• Synonyms: Complement Factor B (CFB); Recombinant Complement Factor B (CFB); CFB recombinant protein

• Host: E Coli
• Purity/Purification: > 95%
• Form/Format: Supplied as lyophilized form in PBS,pH7.4, containing 5% sucrose, 0.01% sarcosyl.
• Sequence: The target protein is fused with two N-terminal Tags, His-tag and GST-tag, its sequence is listed below.; MRNKKFEL GLEFPNLPYY IDGDVKLTQS MAIIRYIADK HNMLGGCPKE RAEISMLEGA VLDIRYGVSR IAYSKDFETL KVDFLSKLPE MLKMFEDRLC HKTYLNGDHV THPDFMLYDA LDVVLYMDPM CLDAFPKLVC FKKRIEAIPQ IDKYLKSSKY IAWPLQGWQA TFGGGDHPPK SDGSTSGSGH HHHHHSAGLV PRGSTAIGMK ETAAAKFERQ HMDSPDLGTL EVLFQGPLGS EF-GSCSLE GVEIKGGSFR LLQEGQALEY VCPSGFYPYP VQTRTCRSTG SWSTLKTQDQ KTVRKAECRA IHCPRPHDFE NGEYWPRSPY YNVSDEISFH CYDGYTLRGS ANRTCQVNGR WSGQTAICDN
• Sequence Length: 764

• Applicable Applications for CFB recombinant protein: SDS-PAGE, Western Blot (WB), ELISA (EIA), Immunoprecipitation (IP)
• Organism: Homo sapiens (Human)
• Expression System: Prokaryotic expression
• Residues: Gly35~Asn160 (Accession # P00751) with two N-terminal Tags, His-tag and GST-tag
• Endotoxin Level: <1.0EU per 1ug (determined by the LAL method)
• Reconstitution: Reconstitute in sterile PBS, pH7.2-pH7.4.
• Preparation and Storage: Avoid repeated freeze/thaw cycles. Store at 2-8 degree C for one month. Aliquot and store at -80 degree C for 12 months.; Stability Test: The thermal stability is described by the loss rate of the targetprotein. The loss rate was determined by accelerated thermal degradation test,that is, incubate the protein at 37 degree C for 48h, and no obvious degradation andprecipitation were observed. (Referring from China Biological Products Standard,which was calculated by the Arrhenius equation.) The loss of this protein is lessthan 5% within the expiration date under appropriate storage condition.

NCBI and Uniprot Product Information

• NCBI GI #: 67782358
• NCBI GeneID: 629
• NCBI Accession #: NP_001701.2
• NCBI GenBank Nucleotide #: NM_001710.5
• UniProt Accession #: P00751; O15006; Q29944; Q5JP67; Q5ST50; Q96HX6; Q9BTF5; Q9BX92; B0QZQ6
• Molecular Weight: 41.3kDa
• NCBI Official Full Name: complement factor B preproprotein
• NCBI Official Synonym Full Names: complement factor B
• NCBI Official Symbol: CFB
• NCBI Official Synonym Symbols: BF; FB; BFD; GBG; CFAB; PBF2; AHUS4; FBI12; H2-Bf; ARMD14
• NCBI Protein Information: complement factor B; C3 proactivator; C3/C5 convertase; C3 proaccelerator; properdin factor B; B-factor, properdin; glycine-rich beta glycoprotein; glycine-rich beta-glycoprotein
• UniProt Protein Name: Complement factor B
• Protein Family: Complement factor
• UniProt Gene Name: CFB
• UniProt Synonym Gene Names: BF; BFD; GBG
• UniProt Entry Name: CFAB_HUMAN

NCBI Description

This gene encodes complement factor B, a component of the alternative pathway of complement activation. Factor B circulates in the blood as a single chain polypeptide. Upon activation of the alternative pathway, it is cleaved by complement factor D yielding the noncatalytic chain Ba and the catalytic subunit Bb. The active subunit Bb is a serine protease which associates with C3b to form the alternative pathway C3 convertase. Bb is involved in the proliferation of preactivated B lymphocytes, while Ba inhibits their proliferation. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. This cluster includes several genes involved in regulation of the immune reaction. Polymorphisms in this gene are associated with a reduced risk of age-related macular degeneration. The polyadenylation site of this gene is 421 bp from the 5' end of the gene for complement component 2. [provided by RefSeq, Jul 2008]

Uniprot Description

CFB: Factor B which is part of the alternate pathway of the complement system is cleaved by factor D into 2 fragments: Ba and Bb. Bb, a serine protease, then combines with complement factor 3b to generate the C3 or C5 convertase. It has also been implicated in proliferation and differentiation of preactivated B- lymphocytes, rapid spreading of peripheral blood monocytes, stimulation of lymphocyte blastogenesis and lysis of erythrocytes. Ba inhibits the proliferation of preactivated B-lymphocytes. Defects in CFB are a cause of susceptibility to hemolytic uremic syndrome atypical type 4 (AHUS4). An atypical form of hemolytic uremic syndrome. It is a complex genetic disease characterized by microangiopathic hemolytic anemia, thrombocytopenia, renal failure and absence of episodes of enterocolitis and diarrhea. In contrast to typical hemolytic uremic syndrome, atypical forms have a poorer prognosis, with higher death rates and frequent progression to end-stage renal disease. Susceptibility to the development of atypical hemolytic uremic syndrome can be conferred by mutations in various components of or regulatory factors in the complement cascade system. Other genes may play a role in modifying the phenotype. Belongs to the peptidase S1 family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 3.4.21.47; Secreted; Protease; Secreted, signal peptide

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: extracellular space; plasma membrane; extracellular region

Molecular Function: complement binding; serine-type endopeptidase activity

Biological Process: complement activation, alternative pathway; regulation of complement activation; innate immune response; proteolysis; complement activation

Disease: Macular Degeneration, Age-related, 14; Complement Factor B Deficiency; Hemolytic Uremic Syndrome, Atypical, Susceptibility To, 4