UniProtKB/Swiss-Prot P51787: Variant p.Lys557Glu

Potassium voltage-gated channel subfamily KQT member 1
Gene: KCNQ1
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Variant information Variant position:

557 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 Lysine (K) to Glutamate (E) at position 557 (K557E, p.Lys557Glu). 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 large size and basic (K) to medium size and acidic (E) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score:

1 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 LQT1; no effect on cell membrane localization; slows activation kinetics; accelerates deactivation kinetics; rightshifts the voltage-dependent activation; does not affect cAMP-dependent up-regulation; decreases interaction with KCNE1 C-terminus; does not affect plasma membrane localization; does not affect phosphorylation at S-27 during cAMP-dependent stimulation; reduces IKS current density; impairs binding with Phosphatidylinositol 4,5-bisphosphate. Any additional useful information about the variant.
Other resources:

Links to websites of interest for the variant.

Variant rs199472801 [ dbSNP | Ensembl ]

Sequence information Variant position:

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

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

DVRDVIEQYSQGHLNLMVRI K ELQRRLDQSIGKPSLFISVS 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                         DVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFISVS

Mouse                         DVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFIPIS

Rat                           DVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFIPIS

Pig                           DVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGRPALFISSS

Rabbit                        DVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFVPIS

Xenopus laevis                DVRDVIEQYSQGHLNLMVRIKELQRRLDQSLGKPSLFLSVS

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 – 676	Potassium voltage-gated channel subfamily KQT member 1
Topological domain	349 – 676	Cytoplasmic
Region	535 – 572	Interaction with KCNE1 C-terminus

Literature citations
Spectrum and prevalence of mutations from the first 2,500 consecutive unrelated patients referred for the FAMILION long QT syndrome genetic test.
Kapplinger J.D.; Tester D.J.; Salisbury B.A.; Carr J.L.; Harris-Kerr C.; Pollevick G.D.; Wilde A.A.; Ackerman M.J.;
Heart Rhythm 6:1297-1303(2009)
Cited for: VARIANTS LQT1 VAL-2; SER-7; THR-46; 64-PRO--PRO-70 DEL; PHE-66; THR-73; CYS-111; LEU-117; LEU-127; ILE-133; PRO-134; ALA-144; MET-153; MET-162; ARG-168; MET-172; CYS-174; HIS-174; THR-178; SER-179; HIS-184; ARG-186; GLN-190; LEU-190; TRP-195; VAL-198; ALA-199; MET-204; MET-215; MET-224; LEU-225; CYS-231; HIS-231; ASN-235; GLY-241; ASN-242; CYS-243; PRO-250; MET-254; CYS-259; LEU-259; VAL-262; PRO-266; SER-268; ASP-269; SER-269; ASP-272; PHE-273; VAL-274; LEU-277; PRO-277; GLU-280; CYS-281; PRO-282; GLY-283; ASP-292; CYS-293; GLU-302; VAL-302; PRO-303; ARG-305; SER-305; ARG-306; ILE-312; CYS-314; SER-314; CYS-315; VAL-316; SER-320; ALA-322; MET-322; ARG-325; TYR-339; GLU-341; GLY-341; VAL-341; PHE-342; LEU-343; ARG-350; SER-351; ARG-354; MET-360; ARG-362; HIS-365; GLN-366; TRP-366; HIS-374; GLY-379; LYS-385; PRO-389; THR-391 INS; TRP-397; ARG-398; GLU-446; LEU-448; TRP-451; SER-460; LEU-477; TRP-511; GLN-518; ARG-520; SER-522; GLY-524; THR-525; VAL-525; TRP-533; GLN-539; TRP-539; ILE-541; LYS-543; LEU-546; ARG-547; CYS-555; HIS-555; SER-555; GLU-557; PHE-566; PRO-566; TYR-566; THR-567; ARG-568; GLU-569; LEU-571; MET-587; ASP-589; CYS-591; HIS-591; GLN-594; PRO-594; GLU-596 DEL; LYS-596; MET-600; ASN-611; HIS-614 DEL; SER-626 AND ARG-635; Long-QT mutation p.K557E-Kv7.1: dominant-negative suppression of IKs, but preserved cAMP-dependent up-regulation.
Spaetjens R.L.; Bebarova M.; Seyen S.R.; Lentink V.; Jongbloed R.J.; Arens Y.H.; Heijman J.; Volders P.G.;
Cardiovasc. Res. 104:216-225(2014)
Cited for: VARIANT LQT1 GLU-557; CHARACTERIZATION OF VARIANT LQT1 GLU-557; Long QT mutations at the interface between KCNQ1 helix C and KCNE1 disrupt I(KS) regulation by PKA and PIP(2).
Dvir M.; Strulovich R.; Sachyani D.; Ben-Tal Cohen I.; Haitin Y.; Dessauer C.; Pongs O.; Kass R.; Hirsch J.A.; Attali B.;
J. Cell Sci. 127:3943-3955(2014)
Cited for: CHARACTERIZATION OF VARIANTS LQT1 LEU-546; CYS-555; HIS-555; GLU-557 AND ASP-589; INTERACTION WITH KCNE1 AND AKAP9; SUBCELLULAR LOCATION; FUNCTION;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.