UniProtKB/Swiss-Prot Q9BZD2: Variant p.Val239Ile

Equilibrative nucleoside transporter 3
Gene: SLC29A3
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Variant information Variant position:

239 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant:

LB/B The variants are classified into three categories: LP/P, LB/B and US.

LP/P: likely pathogenic or pathogenic.
LB/B: likely benign or benign.
US: uncertain significance

Residue change:

From Valine (V) to Isoleucine (I) at position 239 (V239I, p.Val239Ile). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties:

Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score:

3 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:

Lowest score: -4 (low probability of substitution).
Highest score: 11 (high probability of substitution).

More information can be found on the following page
Other resources:

Links to websites of interest for the variant.

Variant rs2252996 [ dbSNP | Ensembl ]

Sequence information Variant position:

239 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length:

475 The length of the canonical sequence.
Location on the sequence:

DLAASSDVRNSALAFFLTAT V FLVLCMGLYLLLSRLEYARY The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation:

The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         DLAASSDVRNSALAFFLTATVFLVLCMGLYLLLSRLEYARY

Mouse                         DLAASSDVRDSTLAFFLMAAVFLGLCMGLYLLLSQLEYARY

Rat                           DLAASSDVRDSALAFFLTAAVFLGLCVGLYLLLPQLEYARY

Bovine                        DLAVASDVTDSTLAFFLTADIFLALCIGLYLLLPRLDYARY

Sequence annotation in neighborhood:

The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:

Type: the type of sequence feature.
Positions: endpoints of the sequence feature.
Description: contains additional information about the feature.

Type	Positions	Description
Chain	1 – 475	Equilibrative nucleoside transporter 3
Transmembrane	231 – 251	Helical
Site	219 – 219	Important for acidic pH-dependent nucleoside transporter activity. Acts as a pH sensor
Mutagenesis	219 – 219	D -> A. Decreased adenosine transport at pH 5.5. Partial loss of acidic pH-dependent activity resulting in emergence of adenosine transport at pH 7.4. Decreased nucleoside transport at pH 5.5; when associated with A-447. Complete loss of acidic pH-dependent activity resulting in full nucleoside transport at pH 7.4 as observed at pH 5.5; when associated with A-447.
Mutagenesis	225 – 225	D -> A. Decreased adenosine transport at pH5.5.
Mutagenesis	233 – 233	F -> A. Decreased adenosine transport at pH 5.5.
Mutagenesis	244 – 244	C -> A. Decreased adenosine transport at pH 5.5.
Mutagenesis	255 – 255	E -> A. No change in adenosine transport.

Literature citations
The ENT family of eukaryote nucleoside and nucleobase transporters: recent advances in the investigation of structure/function relationships and the identification of novel isoforms.
Hyde R.J.; Cass C.E.; Young J.D.; Baldwin S.A.;
Mol. Membr. Biol. 18:53-63(2001)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANTS PHE-158; ILE-239 AND VAL-326; Expression of human equilibrative nucleoside transporter-3 confers cellular resistance to nucleoside drugs.
Tse C.-M.; Ward J.L.; Toan S.-V.; Leung G.P.H.; To K.K.W.;
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANTS PHE-158; ILE-239 AND VAL-326; The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment.
Clark H.F.; Gurney A.L.; Abaya E.; Baker K.; Baldwin D.T.; Brush J.; Chen J.; Chow B.; Chui C.; Crowley C.; Currell B.; Deuel B.; Dowd P.; Eaton D.; Foster J.S.; Grimaldi C.; Gu Q.; Hass P.E.; Heldens S.; Huang A.; Kim H.S.; Klimowski L.; Jin Y.; Johnson S.; Lee J.; Lewis L.; Liao D.; Mark M.R.; Robbie E.; Sanchez C.; Schoenfeld J.; Seshagiri S.; Simmons L.; Singh J.; Smith V.; Stinson J.; Vagts A.; Vandlen R.L.; Watanabe C.; Wieand D.; Woods K.; Xie M.-H.; Yansura D.G.; Yi S.; Yu G.; Yuan J.; Zhang M.; Zhang Z.; Goddard A.D.; Wood W.I.; Godowski P.J.; Gray A.M.;
Genome Res. 13:2265-2270(2003)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1); VARIANTS GLY-18; ILE-239 AND VAL-326; Complete sequencing and characterization of 21,243 full-length human cDNAs.
Ota T.; Suzuki Y.; Nishikawa T.; Otsuki T.; Sugiyama T.; Irie R.; Wakamatsu A.; Hayashi K.; Sato H.; Nagai K.; Kimura K.; Makita H.; Sekine M.; Obayashi M.; Nishi T.; Shibahara T.; Tanaka T.; Ishii S.; Yamamoto J.; Saito K.; Kawai Y.; Isono Y.; Nakamura Y.; Nagahari K.; Murakami K.; Yasuda T.; Iwayanagi T.; Wagatsuma M.; Shiratori A.; Sudo H.; Hosoiri T.; Kaku Y.; Kodaira H.; Kondo H.; Sugawara M.; Takahashi M.; Kanda K.; Yokoi T.; Furuya T.; Kikkawa E.; Omura Y.; Abe K.; Kamihara K.; Katsuta N.; Sato K.; Tanikawa M.; Yamazaki M.; Ninomiya K.; Ishibashi T.; Yamashita H.; Murakawa K.; Fujimori K.; Tanai H.; Kimata M.; Watanabe M.; Hiraoka S.; Chiba Y.; Ishida S.; Ono Y.; Takiguchi S.; Watanabe S.; Yosida M.; Hotuta T.; Kusano J.; Kanehori K.; Takahashi-Fujii A.; Hara H.; Tanase T.-O.; Nomura Y.; Togiya S.; Komai F.; Hara R.; Takeuchi K.; Arita M.; Imose N.; Musashino K.; Yuuki H.; Oshima A.; Sasaki N.; Aotsuka S.; Yoshikawa Y.; Matsunawa H.; Ichihara T.; Shiohata N.; Sano S.; Moriya S.; Momiyama H.; Satoh N.; Takami S.; Terashima Y.; Suzuki O.; Nakagawa S.; Senoh A.; Mizoguchi H.; Goto Y.; Shimizu F.; Wakebe H.; Hishigaki H.; Watanabe T.; Sugiyama A.; Takemoto M.; Kawakami B.; Yamazaki M.; Watanabe K.; Kumagai A.; Itakura S.; Fukuzumi Y.; Fujimori Y.; Komiyama M.; Tashiro H.; Tanigami A.; Fujiwara T.; Ono T.; Yamada K.; Fujii Y.; Ozaki K.; Hirao M.; Ohmori Y.; Kawabata A.; Hikiji T.; Kobatake N.; Inagaki H.; Ikema Y.; Okamoto S.; Okitani R.; Kawakami T.; Noguchi S.; Itoh T.; Shigeta K.; Senba T.; Matsumura K.; Nakajima Y.; Mizuno T.; Morinaga M.; Sasaki M.; Togashi T.; Oyama M.; Hata H.; Watanabe M.; Komatsu T.; Mizushima-Sugano J.; Satoh T.; Shirai Y.; Takahashi Y.; Nakagawa K.; Okumura K.; Nagase T.; Nomura N.; Kikuchi H.; Masuho Y.; Yamashita R.; Nakai K.; Yada T.; Nakamura Y.; Ohara O.; Isogai T.; Sugano S.;
Nat. Genet. 36:40-45(2004)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 2); VARIANTS PHE-158; ILE-239 AND VAL-326; The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).
The MGC Project Team;
Genome Res. 14:2121-2127(2004)
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1); VARIANTS PHE-158; ILE-239 AND VAL-326;

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