UniProtKB/SwissProt variant VAR

Variant information

Variant position:

844

The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:

LP/P [Disclaimer]

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 Leucine (L) to Phenylalanine (F) at position 844 (L844F, p.Leu844Phe).

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:

Change from medium size and hydrophobic (L) to large size and aromatic (F)

The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:

0

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

Variant description:

In NF1.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs199474785 [ dbSNP | Ensembl ]

Sequence information

Variant position:

844

The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:

2839

The length of the canonical sequence.

Location on the sequence:

GSIDLSDTDSLQEWINMTGF L CALGGVCLQQRSNSGLATYS

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                         GSIDLSDTDSLQEWINMTGFLCALGGVCLQQRSNSGLATYS

Mouse                         GSIDLSDTDSLQEWINMTGFLCALGGVCLQQRSSSGLATYS

Rat                           GSIDLSDTDSLQEWINMTGFLCALGGVCLQQRSSSGLATYS

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	2 – 2839	Neurofibromin
Chain	2 – 1305	Neurofibromin truncated
Modified residue	864 – 864	Phosphoserine
Alternative sequence	552 – 2839	Missing. In isoform 3.
Alternative sequence	594 – 2839	Missing. In isoform 5.
Helix	832 – 846

Literature citations

NF1 gene analysis focused on CpG-rich exons in a cohort of 93 patients with neurofibromatosis type 1.
Boulandet E.G.; Pantel J.; Cazeneuve C.; Van Gijn M.; Vidaud D.; Lemay S.; Martin J.; Zeller J.; Revuz J.; Goossens M.; Amselem S.; Wolkenstein P.;
Hum. Mutat. 16:274-275(2000)
Cited for: VARIANT NF1 PHE-844;

Automated comparative sequence analysis identifies mutations in 89% of NF1 patients and confirms a mutation cluster in exons 11-17 distinct from the GAP related domain.
Mattocks C.; Baralle D.; Tarpey P.; ffrench-Constant C.; Bobrow M.; Whittaker J.;
J. Med. Genet. 41:E48-E48(2004)
Cited for: VARIANTS NF1 ARG-31; PRO-145; ARG-324; VAL-337; CYS-489; PRO-532; ARG-574; ARG-629; PHE-665; PHE-844; PRO-844; MET-991 DEL; VAL-1073; ARG-1196; GLY-1276; GLN-1276; GLU-1430; GLU-1459 DEL AND GLY-1489; VARIANTS GLU-176 AND CYS-873;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P21359: Variant p.Leu844Phe