potassium voltage-gated channel subfamily KQT member 2 (KCNQ2) associates with KCNQ3 to form a potassium channel with essentially identical properties to the channel underlying the native M-current, a slowly activating and deactivating potassium conductance which plays a critical role in determining the subthreshold electrical excitability of neurons as well as the responsiveness to synaptic inputs
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the ...
786-886
2.56e-59
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the localization of voltage-gated sodium channels (VGSCs) at the axon initial segment and for neurons to initiate action potentials. This conserved 9-amino acid motif ((V/A)P(I/L)AXXE(S/D)D) is required for ankyrin-G binding and functions to localize sodium channels to a variety of 'excitable' membrane domains both inside and outside of the nervous system. This motif has also been identified in the potassium channel 6TM proteins KCNQ2 and KCNQ3, that correspond to the M channels that exert a crucial influence over neuronal excitability. KCNQ2/KCNQ3 channels are preferentially localized to the surface of axons both at the axonal initial segment and more distally, and this axonal initial segment targeting of surface KCNQ channels is mediated by these ankyrin-G binding motifs of KCNQ2 and KCNQ3. KCNQ3 is a major determinant of M channel localization to the AIS, rather than KCNQ2. Phylogenetic analysis reveals that anchor motifs evolved sequentially in chordates (NaV channel) and jawed vertebrates (KCNQ2/3).
:
Pssm-ID: 463411 Cd Length: 101 Bit Score: 196.92 E-value: 2.56e-59
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of ...
683-774
6.76e-51
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of natively unstructured sequence on potassium voltage-gated channel subfamily KQT member 2 proteins from higher eukaryotes. It lies between families KCNQ_channel, pfam03520, and KCNQC3-Ank_bd, pfam11956. The function is not known.
:
Pssm-ID: 465213 Cd Length: 98 Bit Score: 173.52 E-value: 6.76e-51
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This ...
92-324
8.16e-41
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This family is 6 transmembrane helices in which the last two helices flank a loop which determines ion selectivity. In some sub-families (e.g. Na channels) the domain is repeated four times, whereas in others (e.g. K channels) the protein forms as a tetramer in the membrane.
:
Pssm-ID: 459842 [Multi-domain] Cd Length: 238 Bit Score: 150.11 E-value: 8.16e-41
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the ...
786-886
2.56e-59
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the localization of voltage-gated sodium channels (VGSCs) at the axon initial segment and for neurons to initiate action potentials. This conserved 9-amino acid motif ((V/A)P(I/L)AXXE(S/D)D) is required for ankyrin-G binding and functions to localize sodium channels to a variety of 'excitable' membrane domains both inside and outside of the nervous system. This motif has also been identified in the potassium channel 6TM proteins KCNQ2 and KCNQ3, that correspond to the M channels that exert a crucial influence over neuronal excitability. KCNQ2/KCNQ3 channels are preferentially localized to the surface of axons both at the axonal initial segment and more distally, and this axonal initial segment targeting of surface KCNQ channels is mediated by these ankyrin-G binding motifs of KCNQ2 and KCNQ3. KCNQ3 is a major determinant of M channel localization to the AIS, rather than KCNQ2. Phylogenetic analysis reveals that anchor motifs evolved sequentially in chordates (NaV channel) and jawed vertebrates (KCNQ2/3).
Pssm-ID: 463411 Cd Length: 101 Bit Score: 196.92 E-value: 2.56e-59
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of ...
683-774
6.76e-51
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of natively unstructured sequence on potassium voltage-gated channel subfamily KQT member 2 proteins from higher eukaryotes. It lies between families KCNQ_channel, pfam03520, and KCNQC3-Ank_bd, pfam11956. The function is not known.
Pssm-ID: 465213 Cd Length: 98 Bit Score: 173.52 E-value: 6.76e-51
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This ...
92-324
8.16e-41
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This family is 6 transmembrane helices in which the last two helices flank a loop which determines ion selectivity. In some sub-families (e.g. Na channels) the domain is repeated four times, whereas in others (e.g. K channels) the protein forms as a tetramer in the membrane.
Pssm-ID: 459842 [Multi-domain] Cd Length: 238 Bit Score: 150.11 E-value: 8.16e-41
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the ...
786-886
2.56e-59
Ankyrin-G binding motif of KCNQ2-3; Interactions with ankyrin-G are crucial to the localization of voltage-gated sodium channels (VGSCs) at the axon initial segment and for neurons to initiate action potentials. This conserved 9-amino acid motif ((V/A)P(I/L)AXXE(S/D)D) is required for ankyrin-G binding and functions to localize sodium channels to a variety of 'excitable' membrane domains both inside and outside of the nervous system. This motif has also been identified in the potassium channel 6TM proteins KCNQ2 and KCNQ3, that correspond to the M channels that exert a crucial influence over neuronal excitability. KCNQ2/KCNQ3 channels are preferentially localized to the surface of axons both at the axonal initial segment and more distally, and this axonal initial segment targeting of surface KCNQ channels is mediated by these ankyrin-G binding motifs of KCNQ2 and KCNQ3. KCNQ3 is a major determinant of M channel localization to the AIS, rather than KCNQ2. Phylogenetic analysis reveals that anchor motifs evolved sequentially in chordates (NaV channel) and jawed vertebrates (KCNQ2/3).
Pssm-ID: 463411 Cd Length: 101 Bit Score: 196.92 E-value: 2.56e-59
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of ...
683-774
6.76e-51
Unstructured region on Potassium channel subunit alpha KvLQT2; KCNQ2_u3 is a region of natively unstructured sequence on potassium voltage-gated channel subfamily KQT member 2 proteins from higher eukaryotes. It lies between families KCNQ_channel, pfam03520, and KCNQC3-Ank_bd, pfam11956. The function is not known.
Pssm-ID: 465213 Cd Length: 98 Bit Score: 173.52 E-value: 6.76e-51
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This ...
92-324
8.16e-41
Ion transport protein; This family contains sodium, potassium and calcium ion channels. This family is 6 transmembrane helices in which the last two helices flank a loop which determines ion selectivity. In some sub-families (e.g. Na channels) the domain is repeated four times, whereas in others (e.g. K channels) the protein forms as a tetramer in the membrane.
Pssm-ID: 459842 [Multi-domain] Cd Length: 238 Bit Score: 150.11 E-value: 8.16e-41
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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of your query sequence and the protein sequences used to curate the domain model,
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The thumbnail image, if present, provides an approximate view of the feature's location in 3 dimensions.
Click on the triangle for interactive 3D structure viewing options.
Functional characterization of the conserved domain architecture found on the query.
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This image shows a graphical summary of conserved domains identified on the query sequence.
The Show Concise/Full Display button at the top of the page can be used to select the desired level of detail: only top scoring hits
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Domains are color coded according to superfamilies
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if a domain or superfamily has been annotated with functional sites (conserved features),
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click on the bars or triangles to view your query sequence embedded in a multiple sequence alignment of the proteins used to develop the corresponding domain model.
The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
Click on the domain model's accession number to view the multiple sequence alignment of the proteins used to develop the corresponding domain model.
To view your query sequence embedded in that multiple sequence alignment, click on the colored bars in the Graphical Summary portion of the search results page,
or click on the triangles, if present, that represent functional sites (conserved features)
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Concise Display shows only the best scoring domain model, in each hit category listed below except non-specific hits, for each region on the query sequence.
(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
(labeled illustration) Full Display shows all domain models, in each hit category below, that meet or exceed the RPS-BLAST threshold for statistical significance.
(labeled illustration) Four types of hits can be shown, as available,
for each region on the query sequence:
specific hits meet or exceed a domain-specific e-value threshold
(illustrated example)
and represent a very high confidence that the query sequence belongs to the same protein family as the sequences use to create the domain model
non-specific hits
meet or exceed the RPS-BLAST threshold for statistical significance (default E-value cutoff of 0.01, or an E-value selected by user via the
advanced search options)
the domain superfamily to which the specific and non-specific hits belong
multi-domain models that were computationally detected and are likely to contain multiple single domains
Retrieve proteins that contain one or more of the domains present in the query sequence, using the Conserved Domain Architecture Retrieval Tool
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Modify your query to search against a different database and/or use advanced search options
