Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.
Lead Time
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Usage
For Research Use Only. Not for use in diagnostic or therapeutic procedures.
Sodium-dependent, pyrimidine- and purine-selective. Involved in the homeostasis of endogenous nucleosides. Exhibits the transport characteristics of the nucleoside transport system cib or N3 subtype (N3/cib) (with marked transport of both thymidine and inosine). Employs a 2:1 sodium/nucleoside ratio. Also able to transport gemcitabine, 3'-azido-3'-deoxythymidine (AZT), ribavirin and 3-deazauridine.
Gene References into Functions
De novo structure prediction of three N-terminal transmembrane helices of the human concentrative nucleoside transporter 3 (hCNT3) homotrimer belonging to the solute carrier 28 family of transporters (SLC28) using Rosetta program and its Broker protocol. PMID: 28774292
CYR61 negatively regulates the nucleoside transporters hENT1 and hCNT3 in pancreatic ductal adenocarcinoma. PMID: 27604902
Data suggest that CNT3 forms a homotrimer in solution and membrane-bound inside cells; the quaternary structure creates an aqueous basin that significantly shortens the substrate translocation distance. PMID: 28661652
results that validate the newly developed structural homology model of CNT membrane architecture for human CNTs, revealed extended conformationally mobile regions within transport-domain TMs, identified pore-lining residues of functional importance, and provided evidence of an emerging novel elevator-type mechanism of transporter function. PMID: 28385889
Genome-wide association analysis on normal hearing function identifies PCDH20 and SLC28A3 as good candidates for modulatory genes in the auditory system. [meta-analysis] PMID: 26188009
The co-expression of galectin-4 and CNT3 proteins is not impaired in inflamed colon from patients with Crohn's disease, thereby anticipating the integrity of this system for drug targeting. PMID: 26481311
Results show that high CNT3 expression level is associated with overall favorable outcomes and is predictive of clinical outcomes in acute myeloid leukemia patients with t(8;21). PMID: 25955569
The presence of homozygous major allele for SLC28A3 (CC genotype) were each associated with an almost two-fold increase in the formation clearance of dFdCTP. PMID: 24300978
Genetic polymorphisms in SLC28A3, SLC29A1 and RRM1 can influence the clinical outcome of metastatic breast cancer patients treated with paclitaxel-gemcitabine chemotherapy. PMID: 24361227
association between ribavirin (RBV) serum levels and SLC28A2 rs11854484 genotype, as well as the replicated association of ITPA and SLC28A3 genetic polymorphisms with RBV-induced anemia and treatment response PMID: 23195617
Data show that ENT1, ENT2, ENT4 and CNT3 protein was detected on ovarian carcinoma cells in all effusions, with expression observed in 1-95% of tumor cells. PMID: 21822668
A genetic variant in SCL28A3 coding for the concentrative nucleoside transporter 3 protects patients with chronic hepatitis C against hemolytic anemia without affecting sustained virological response in hepatitis C virus genotype 1. PMID: 21346688
Acidic and hydrophobic motifs in the N terminus tail of the hCNT3 control ER export and cell surface expression levels in nonpolarized cells, whereas a putative beta-turn domain contributes to hCNT3 polarized surface expression in epithelial cells. PMID: 20643903
H+ drives uridine and adenosine transport by hCNT3 with lower affinity but higher maximal transport rate than Na+. PMID: 20495821
TGF-beta1 acts through activation of ERK1/2 and the small GTPase RhoA to promote plasma membrane trafficking of the hCNT3 protein. PMID: 20172853
hCNT3 gene is evolutionarily conserved with hCNT1 and hCNT2. Physiologically, hCNT3 is a glycoprotein, which transports purine and pyrimidine nucleosides in a Na-dependent manner with high affinities. PMID: 14504928
genetic analysis and functional characterization of CNT3 variants suggest that this transporter does not tolerate nonsynonymous changes and is important for human fitness PMID: 15738947
examination of single nucleotide polymorphisms in the coding regions of the hCNT3 gene PMID: 15861042
hCNT3 possesses two Na+-binding sites, only one of which is shared by H+ PMID: 15870078
The effects of cysteine substitution mutants spanning transmembrane domains 11-13 on the transport activity of CNT3 expressed in S. cerevisiae are reported. PMID: 16271041
Minimal features required for human CNT3 transport are two hydrogen bond acceptors at 3'-OH and 5'-O and the hydrophobic center occupied by the base ring. PMID: 16446384
transcripts for CNT3 protein in human kidneys and in cultured proximal tubule cells suggest involvement of CNT3 in renal handling of nucleosides and nucleoside drugs PMID: 17409283
CNT3 was inserted into the apical membrane, thus generating, a transepithelial flux of both nucleosides and nucleoside-derived drugs. PMID: 17412768
hCNT2 shares common cation specificity and coupling characteristics with hCNT1, which differ markedly from those of hCNT3. PMID: 17453413
This study shows that adenosine elimination on human airway epithelia is mediated by ADA1, CNT2, and CNT3, which constitute important regulators of adenosine-mediated inflammation. PMID: 17696452
These data suggest that selected genes of the SLC28 and SLC29 families are not only targets of HIV-1 infection, but might also contribute to the development of adipose tissue alterations leading to lipodystrophy. PMID: 17926640
A polymorphic variant of the human concentrative nucleoside transporter, CNT3, is found that severely affects its functionality. PMID: 17993510
identified a C-terminal intramembranous cysteine residue of hCNT3 (Cys-561) that reversibly binds the hydrophilic thiol-reactive reagent p-chloromercuribenzene sulfonate (PCMBS) PMID: 18199742
a pivotal functional role for Cys-561 in Na+- as well as H+-coupled modes of hCNT3 nucleoside transport PMID: 18621735
The isolation and charcterization of an alternatively spliced SLC28A3-related mRNA is reported. PMID: 18827020
This evidence suggested that apical CNT3 and basolateral ENT2 are involved in proximal tubular reabsorption of adenosine and some nucleoside drugs and that apical ENT1 is involved in proximal tubular secretion of 2'-deoxyadenosine. PMID: 19297449
Pancreatic adenocarcinoma patients with a high expression of hENT1 and hCNT3 immunostaining have a significantly longer survival after adjuvant gemcitabine-based chemoradiation PMID: 19318496
identified residues of functional importance and with a revised 15-TM membrane architecture, suggest a novel membrane-associated topology for a region of the protein (TM 11A) that includes the highly conserved CNT family motif (G/A)XKX(3)NEFVA(Y/M/F) PMID: 19380585
identified two conserved pore-lining glutamate residues (Glu-343 and Glu-519) with essential roles in CNT3 Na(+)/nucleoside and H(+)/nucleoside cotransport PMID: 19380587
Concentrative nucleoside transporter (CNT) (TC 2.A.41) family
Tissue Specificity
Expressed in pancreas, bone marrow, trachea, mammary gland, liver, prostate, and regions of intestine, brain, lung, placenta, testis, kidney, and heart.