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  4. Recombinant Human Complement factor I (CFI)

Recombinant Human Complement factor I (CFI)

  • 货号：
    CSB-YP005279HU
  • 规格：
  • 来源：
    Yeast
  • 其他：
  • 货号：
    CSB-EP005279HU-B
  • 规格：
  • 来源：
    E.coli
  • 共轭：
    Avi-tag Biotinylated

    E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.

  • 其他：
  • 货号：
    CSB-BP005279HU
  • 规格：
  • 来源：
    Baculovirus
  • 其他：

产品详情

  • 纯度：
    >85% (SDS-PAGE)
  • 基因名：
  • Uniprot No.：
  • 别名：
    AHUS3; ARMD13; C3b INA; C3b inactivator ; C3B/C4B inactivator; C3BINA; CFAI_HUMAN; Cfi; Complement component I; Complement control protein factor I; Complement factor I; Complement factor I heavy chain; Complement factor I light chain; F1; factor I ; FactorI; FI; I factor; IF; KAF; Konglutinogen activating factor; Light chain of factor I ; OTTHUMP00000219728; OTTHUMP00000221928
  • 种属：
    Homo sapiens (Human)
  • 蛋白长度：
    Full Length of Mature Protein
  • 表达区域：
    19-583
  • 氨基酸序列
    KV TYTSQEDLVE KKCLAKKYTH LSCDKVFCQP WQRCIEGTCV CKLPYQCPKN GTAVCATNRR SFPTYCQQKS LECLHPGTKF LNNGTCTAEG KFSVSLKHGN TDSEGIVEVK LVDQDKTMFI CKSSWSMREA NVACLDLGFQ QGADTQRRFK LSDLSINSTE CLHVHCRGLE TSLAECTFTK RRTMGYQDFA DVVCYTQKAD SPMDDFFQCV NGKYISQMKA CDGINDCGDQ SDELCCKACQ GKGFHCKSGV CIPSQYQCNG EVDCITGEDE VGCAGFASVT QEETEILTAD MDAERRRIKS LLPKLSCGVK NRMHIRRKRI VGGKRAQLGD LPWQVAIKDA SGITCGGIYI GGCWILTAAH CLRASKTHRY QIWTTVVDWI HPDLKRIVIE YVDRIIFHEN YNAGTYQNDI ALIEMKKDGN KKDCELPRSI PACVPWSPYL FQPNDTCIVS GWGREKDNER VFSLQWGEVK LISNCSKFYG NRFYEKEMEC AGTYDGSIDA CKGDSGGPLV CMDANNVTYV WGVVSWGENC GKPEFPGVYT KVANYFDWIS YHVGRPFISQ YNV
  • 蛋白标签：
    Tag type will be determined during the manufacturing process.
    The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
  • 产品提供形式：
    Lyophilized powder
    Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
  • 复溶：
    We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
  • 储存条件：
    Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
  • 保质期：
    The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
    Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
  • 货期：
    Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
    Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
  • 注意事项：
    Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
  • Datasheet ：
    Please contact us to get it.

产品评价

靶点详情

  • 功能：
    Trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. Inhibits these pathways by cleaving three peptide bonds in the alpha-chain of C3b and two bonds in the alpha-chain of C4b thereby inactivating these proteins. Essential cofactors for these reactions include factor H and C4BP in the fluid phase and membrane cofactor protein/CD46 and CR1 on cell surfaces. The presence of these cofactors on healthy cells allows degradation of deposited C3b by CFI in order to prevent undesired complement activation, while in apoptotic cells or microbes, the absence of such cofactors leads to C3b-mediated complement activation and subsequent opsonization.
  • 基因功能参考文献：
    1. This study has revealed a significant genetic role for CFI-rs13104777 in acute anterior uveitis. This influence may be dependent on human leukocyte antigen (HLA)-B27 and disease laterality. PMID: 27380463
    2. An extremely rare, heterozygous mutation in the gene encoding CFI likely affecting splicing was associated for the first time with atypical hemolytic uremic syndrome. PMID: 28455885
    3. this study illustrates the importance of early versus late diagnosis of CFI deficiency PMID: 28942469
    4. This finding although rare does suggest that screening for chromosomal rearrangements affecting CFI should be undertaken in all aHUS patients particularly if the factor I level is unexplainably low. PMID: 27268256
    5. Factor I binds C3b-Factor H between Factor H domains 2 and 3 and a reoriented C3b C-terminal domain and docks onto the first scissile bond, while stabilizing its catalytic domain for proteolytic activity. PMID: 28671664
    6. Taken together, our data argue that multiple rare and ultra-rare alleles in CFI contribute to AMD pathogenesis; they improve the precision of the assessment of the contribution of CFI to AMD PMID: 28282489
    7. Case Report: thrombotic microangiopathy with mutations in complement factor I and thrombomodulin. PMID: 26613809
    8. Our results indicate that CFI polymorphisms are not significantly associated with VKH syndrome. PMID: 26900322
    9. Patients with advanced atrophic AMD carried these rare variants more frequently than patients with neovascular AMD (11 of 93 [11.8%] vs 40 of 835 [4.8%]; P = .04). PMID: 26767664
    10. Low FI levels are strongly associated with rare CFI variants and age-related macular degeneration. PMID: 25788521
    11. A missense variant (p.V412M) in CFI was discovered in two Tunisian Jewish families with early-onset age-related macular degeneration. PMID: 25986072
    12. Regulatory components of the alternative complement pathway in endothelial cell cytoplasm, factor H and factor I, are not packaged in Weibel-Palade bodies. PMID: 25803806
    13. In this study, the odds of AMD were highest in those with deficient vitamin D status and 2 risk alleles for the CFH and CFI genotypes, suggesting a synergistic effect between vitamin D status and complement cascade protein function. PMID: 26312598
    14. iC3b level, a proteolytically inactive form of C3b, was lower in HCV infected patient sera, reflecting impairment of both C3 convertase and Factor I activity. PMID: 24983375
    15. association between rs10033900 and age-related macular degeneration risk in Han Chinese population PMID: 24642830
    16. The mutations in the regulators CFH, CFI and MCP involve loss-of-function, whereas those for C3 involve gain-of-function. PMID: 25188723
    17. The CFI p.Gly119Arg mutation was identified in 7/521 age-related macular degeneration cases compared to 1/627 age-matched controls; this mutation confers a high risk of disease. PMID: 25352734
    18. CFI genetic variants played an important role in the development of NSCLC in Chinese population. PMID: 25394898
    19. High expression of complement factor I is associated with recurrence in breast cancer. PMID: 25618258
    20. results provide evidence for the role of CFI in the progression of cSCC and identify it as a potential therapeutic target in this nonmelanoma skin cancer PMID: 25184960
    21. This study has revealed a significant association between acute anterior uveitis (AAU) and CFI-rs7356506, suggesting that CFI is involved in the pathogenesis of AAU PMID: 25075123
    22. Neither of the two SNPs most studied (rs10033900 or rs2285714) in the CFI gene was a risk factor for developing neovascular age-related macular degeneration or polypoidal choroidal vasculopathy in a Chinese population. PMID: 24732209
    23. Recurrent aseptic meningo-encephalitis is a rare clinical presentation of complete FI deficiency. PMID: 24142231
    24. An STR polymorphism in intron 7 of human CFI gene on chromosome 4q in 11 Asian populations indicated that Group H alleles in exon 11 of the CFI gene were almost entirely confined to East Asian populations, making it useful in forensic anthropology. PMID: 23688582
    25. We found that 7.8% of advanced age-related macular degeneration cases compared to 2.3% of controls are carriers of rare missense CFI variants. PMID: 24036952
    26. Case Report: patient with atypical haemolytic uremic syndrome with combined membrane cofactor protein CD46 and complement factor I mutations undergoing successful kidney transplantation. PMID: 23519521
    27. Mutations in complement factor I protein is associated with end-stage renal disease in a patient with hemolytic uremic syndrome caused by infections by Escherichia coli strains producing Shiga-like toxins. PMID: 23731345
    28. these findings demonstrate that rare, highly penetrant mutations in CFI contribute to the genetic burden of age-related macular degeneration. PMID: 23685748
    29. rs1136287 in CFI is less likely to be associated in in extremely myopic Japanese individuals. PMID: 23722394
    30. The alternative pathway of complement may play a role in the pathogenesis of HELLP syndrome. PMID: 22594569
    31. Acute hemorrhagic leukoencephalitis (AHLE) is an unreported, rare phenotype for partial complement factor I deficiency. PMID: 22926405
    32. we report four novel mutations and the first large gene deletion in the CFI locus. PMID: 22710145
    33. One SNP (rs10033900) in the CFI gene, which encodes a protein involved in the inflammatory pathway, was significantly associated with myopic choroidal neovascularization in multivariate analysis after correction for multiple testing. PMID: 22678500
    34. Since FI requires cofactors for its activity we also investigated the binding of purified cofactors C4BP and FH and found acquisition of both proteins, which retained their activity in FI mediated degradation of C3b and C4b. PMID: 22514678
    35. factor I were significantly diminished early after trauma. PMID: 22258234
    36. all analyzed cofactors form similar trimolecular complexes with FI and C3b/C4b, and the accessibility of FIMAC and SP domains is crucial for the function of FI PMID: 22393059
    37. Results question whether complement factor I autoantibodies per se predispose to atypical hemolytic uremic syndrome. PMID: 22223611
    38. Forster resonance energy transfer was used to investigate the 10 muM K(D) (210 kD) complex between the N-terminal region of the soluble complement regulator, factor H (FH1-4), and the key activation-specific complement fragment, C3b. PMID: 21936007
    39. Data show that FI is in a proteolytically inactive form, demonstrating that it circulates in a zymogen-like state. PMID: 21768352
    40. Study describes the molecular and functional consequences of two novel mutations of FI. PMID: 21316765
    41. Study identified novel mutations in CFH, CFHR5, CFI, CFB and C3 in American patients with atypical hemolytic uremic syndrome. PMID: 20513133
    42. Role of a common variant near the complement factor I gene in susceptibility to age-related macular degeneration. PMID: 20087399
    43. In a large cohort of 202 patients with aHUS, we identified 23 patients carrying exonic mutations in CFI PMID: 20016463
    44. the FIMAC domain appears to harbor the main binding sites important for the ability of FI to degrade C4b and C3b PMID: 20044478
    45. mutations in complement factor I affect both secretion and function of factor I, which leads to impaired regulation of the complement system in atypical hemolytic uremic syndrome. PMID: 19877009
    46. the last 45 amino acid of the heavy chain, including a disulfide bridge area, did not participate in the serine protease function of factor I PMID: 14967308
    47. Human complement factor I does not require cofactors for cleavage of synthetic substrates. PMID: 15210795
    48. fI and the serine protease domain were found to have similar amidolytic activities but strikingly different proteolytic activities on C3(NH(3)). PMID: 15835912
    49. Mutations in the complement regulators factor H, membrane cofactor protein (MCP), and factor I are associated with atypical hemolytic uremic syndrome. PMID: 16386793
    50. factor I in concert with CR1 on E and factor H in serum due to their cofactor activity are likely to be important contributors PMID: 16920989

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  • 相关疾病：
    Hemolytic uremic syndrome atypical 3 (AHUS3); Complement factor I deficiency (CFI deficiency); Macular degeneration, age-related, 13 (ARMD13)
  • 亚细胞定位：
    Secreted, extracellular space. Secreted.
  • 蛋白家族：
    Peptidase S1 family
  • 组织特异性：
    Expressed in the liver by hepatocytes. Also present in other cells such as monocytes, fibroblasts or keratinocytes.
  • 数据库链接：

    HGNC: 5394

    OMIM: 217030

    KEGG: hsa:3426

    STRING: 9606.ENSP00000378130

    UniGene: Hs.312485