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.
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.
產品提供形式:
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.
復溶:
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.
儲存條件:
Store at -20°C/-80°C upon receipt, aliquoting is
necessary for
mutiple use. Avoid repeated freeze-thaw cycles.
保質期:
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.
貨期:
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.
注意事項:
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Interacts with a specific negative regulatory element (NRE) 5'-AATTCCTCTGA-3' to mediate transcriptional repression of certain NK-kappa-B responsive genes. Involved in the constitutive silencing of the interferon beta promoter, independently of the virus-induced signals, and in the inhibition of the basal and cytokine-induced iNOS promoter activity. Also involved in the regulation of IL-8 transcription.
基因功能參考文獻:
NKRF is a nucleolar HSP essential for nucleolus homeostasis and cell survival under proteotoxic stress. NKRF is a thermosensor translocating from the nucleolus to the nucleoplasm during heat stress; nucleolar pools are replenished upon HSF1-mediated NKRF resynthesis. NKRF is an unconventional HSP crucial for correct rRNA processing. Under stress conditions, NKRF directs XRN2 nucleolus/nucleoplasm trafficking. PMID: 28096332
Data suggest that L protein from LCMV interactions with host proteome, specifically DDX3X, NKRF, and TRIM21. (LCMV = Lymphocytic choriomeningitis mammarenavirus; DDX3X = DEAD-box helicase 3; NKRF = NF-kappa-B-repressing factor; TRIM21 = tripartite motif-containing protein-21) PMID: 29261807
depletion of NKRF, XRN2 or DHX15 impairs an early pre-rRNA cleavage step. PMID: 28115624
NF-kappaB-repressing factor (NKRF) phosphorylation modulates promoter-proximal transcription elongation of NF-kappaB/NKRF-regulated genes via direct interactions with elongation complex in response to specific stimuli PMID: 26340924
The up-regulated NKRF serves as an endogenous repressor for IP-10 and IL-8 synthesis to hinder host from robust response to MTb infection. PMID: 25135111
MIR29 targets and reduces expression of CLDN1 and NKRF to increase intestinal permeability in inflammatory bowel disease. PMID: 25277410
NRF may serve as an endogenous repressor to prevent robust increase in IP-10/CXCL10 and IL-8/CXCL8 when TB bacterial load is high. PMID: 24223729
The expression of NKRF is decreased in PBMCs of patients with stable COPD. The downregulation of NKRF was found to be closely related to enhanced IL-8 production from these peripheral blood cells through de-repression of the IL-8 promoter. PMID: 22441735
The results indicate that JKTBP1 regulates the level of NRF protein expression by binding to both NRF 5' and 3' UTRs. PMID: 21300069
role of NF-kappa B-repressing factor (NRF) in basal repression of the hiNOS gene PMID: 12381793
cDNA is 3247 bp long, contains three exons and maps to human chromosome Xq24. NRF is widely expressed in human tissues. PMID: 14744032
Full-length NRF is highly enriched in nucleoli and only a small fraction of NRF is found in the nucleoplasm and cytoplasm PMID: 15226370
NRF interrupts the regulatory coupling of LTR binding factors and transcription elongation events; this inhibitory mechanism might contribute to transcriptional quiescence of integrated HIV-1 provirus PMID: 16107696
Induction of MMP-9 gene expression is regulated by oscillatory/cumulative activation of NFkappaB in a colon cancer cell line. PMID: 17186550
The data of this study show that JKTBP1 and the 14-nt element act independently to mediate NRF internal ribosome entry segment activity. PMID: 17592041
saimiri transformation-associated protein of subgroup C induces NF-kappaB activation PMID: 18560378
Induction of NRF in human airway smooth muscle cells by neutrophil elastase mediates the suppression of interleukin (IL)-8/CXCL8 expression. PMID: 19542452
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亞細胞定位:
Nucleus, nucleolus.
組織特異性:
Widely and constitutively expressed. Expressed at lower level in colon, peripheral blood lymphocytes, lung and kidney.