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.
Choline-specific phosphodiesterase that hydrolyzes sphingomyelin releasing the ceramide and phosphocholine and therefore is involved in sphingomyelin digestion, ceramide formation, and fatty acid (FA) absorption in the gastrointestinal tract. Has also phospholipase C activity and can also cleave phosphocholine from palmitoyl lyso-phosphatidylcholine and platelet-activating factor (PAF) leading to its inactivation. Does not have nucleotide pyrophosphatase activity. May promote cholesterol absorption by affecting the levels of sphingomyelin derived from either diet or endogenous sources, in the intestinal lumen.
基因功能參考文獻:
human alkaline sphingomyelinase crystal structure provides insights into substrate recognition PMID: 28292932
NPP7 activity and the ratio of 1.4/1.2 kb products in bile are significantly decreased in malignancy, particularly in cholangiocarcinoma. PMID: 25100243
The F275A mutation of NPP7 showed impaired catalytic function whereas L107F mutation showed enhanced catalytic activity. PMID: 22177013
predict the three-dimensional structure of NPP7 by homology modeling using a recently crystallized NPP from bacteria. Using the model, we studied the substrate specificity of the enzyme by docking. PMID: 20839774
identified the amino acid and cDNA sequences of human intestinal alk-SMase, and found that it is a novel ecto-enzyme related to the ecto-nucleotide phosphodiesterase family with specific features essential for its SMase activity PMID: 12885774
intestinal alkaline sphingomyelinase may have a one-exon deletion in colon cancer cells PMID: 15016655
alk-SMase activity is severely affected by defective N-glycosylation at 5 sites and by structural alterations of the putative metal-binding sites and the predicted active core. PMID: 15458386
Results describe the cloning of rat alkaline sphingomyelinase from rat intestine, comparison to the human sequence, adjustment of the putative protein in GenBank, and confirmation of the specific expression of the gene in the small intestine. PMID: 15708357
Alkaline sphingomyelinase hydrolyses and inactivates PAF by a phospholipase C activity, a novel function by which it may counteract the development of intestinal inflammation and colon cancer. PMID: 16255717
顯示更多
收起更多
亞細胞定位:
Cell membrane; Single-pass type I membrane protein.
蛋白家族:
Nucleotide pyrophosphatase/phosphodiesterase family
組織特異性:
Detected in the colon (at protein level). Expressed in the duodenum, jejunum and liver and at low levels in the ileum. Expression was very low in the esophagus, stomach and colon.