transcription termination/antitermination protein NusA binds directly to the core enzyme of the DNA-dependent RNA polymerase and to nascent RNA, and participates in both transcription termination and antitermination
transcription termination factor NusA; This model describes NusA, or N utilization substance ...
5-343
6.16e-135
transcription termination factor NusA; This model describes NusA, or N utilization substance protein A, a bacterial transcription termination factor. It binds to RNA polymerase alpha subunit and promotes termination at certain RNA hairpin structures. It is named for the interaction in E. coli of phage lambda antitermination protein N with the N-utilization substance, consisting of NusA, NusB, NusE (ribosomal protein S10), and nusG. This model represents a region of NusA shared in all bacterial forms, and including an S1 (pfam00575) and a KH (pfam00013) RNA binding domains. Proteobacterial forms have an additional C-terminal region, not included in this model, with two repeats of 50-residue domain rich in acidic amino acids. [Transcription, Transcription factors]
Pssm-ID: 273893 [Multi-domain] Cd Length: 341 Bit Score: 389.31 E-value: 6.16e-135
first type II K-homology (KH) RNA-binding domain found in transcription termination ...
201-276
4.07e-37
first type II K-homology (KH) RNA-binding domain found in transcription termination/antitermination protein NusA and similar proteins; NusA, also called N utilization substance protein A or transcription termination/antitermination L factor, is an essential multifunctional transcription elongation factor that participates in both transcription termination and antitermination. NusA anti-termination function plays an important role in the expression of ribosomal rrn operons. During transcription of many other genes, NusA-induced RNA polymerase pausing provides a mechanism for synchronizing transcription and translation. In prokaryotes, the N-terminal RNA polymerase-binding domain (NTD) is connected through a flexible hinge helix to three globular domains, the S1 and two K-homology (KH), KH1 and KH2. The KH domains of NusA belong to the type II KH RNA-binding domain superfamily. This model corresponds to the first KH domain of NusA and similar proteins.
Pssm-ID: 411779 [Multi-domain] Cd Length: 76 Bit Score: 129.19 E-value: 4.07e-37
transcription termination factor NusA; This model describes NusA, or N utilization substance ...
5-343
6.16e-135
transcription termination factor NusA; This model describes NusA, or N utilization substance protein A, a bacterial transcription termination factor. It binds to RNA polymerase alpha subunit and promotes termination at certain RNA hairpin structures. It is named for the interaction in E. coli of phage lambda antitermination protein N with the N-utilization substance, consisting of NusA, NusB, NusE (ribosomal protein S10), and nusG. This model represents a region of NusA shared in all bacterial forms, and including an S1 (pfam00575) and a KH (pfam00013) RNA binding domains. Proteobacterial forms have an additional C-terminal region, not included in this model, with two repeats of 50-residue domain rich in acidic amino acids. [Transcription, Transcription factors]
Pssm-ID: 273893 [Multi-domain] Cd Length: 341 Bit Score: 389.31 E-value: 6.16e-135
first type II K-homology (KH) RNA-binding domain found in transcription termination ...
201-276
4.07e-37
first type II K-homology (KH) RNA-binding domain found in transcription termination/antitermination protein NusA and similar proteins; NusA, also called N utilization substance protein A or transcription termination/antitermination L factor, is an essential multifunctional transcription elongation factor that participates in both transcription termination and antitermination. NusA anti-termination function plays an important role in the expression of ribosomal rrn operons. During transcription of many other genes, NusA-induced RNA polymerase pausing provides a mechanism for synchronizing transcription and translation. In prokaryotes, the N-terminal RNA polymerase-binding domain (NTD) is connected through a flexible hinge helix to three globular domains, the S1 and two K-homology (KH), KH1 and KH2. The KH domains of NusA belong to the type II KH RNA-binding domain superfamily. This model corresponds to the first KH domain of NusA and similar proteins.
Pssm-ID: 411779 [Multi-domain] Cd Length: 76 Bit Score: 129.19 E-value: 4.07e-37
second type II K-homology (KH) RNA-binding domain found in transcription termination ...
279-339
2.35e-27
second type II K-homology (KH) RNA-binding domain found in transcription termination/antitermination protein NusA and similar proteins; NusA, also called N utilization substance protein A or transcription termination/antitermination L factor, is an essential multifunctional transcription elongation factor that participates in both transcription termination and antitermination. NusA anti-termination function plays an important role in the expression of ribosomal rrn operons. During transcription of many other genes, NusA-induced RNA polymerase pausing provides a mechanism for synchronizing transcription and translation. In prokaryotes, the N-terminal RNA polymerase-binding domain (NTD) is connected through a flexible hinge helix to three globular domains, the S1 and two K-homology, KH1 and KH2. The K-homology (KH) domains of NusA belong to the type II KH RNA-binding domain superfamily. This model corresponds to the second KH domain of NusA and similar proteins.
Pssm-ID: 411786 [Multi-domain] Cd Length: 61 Bit Score: 102.62 E-value: 2.35e-27
S1_NusA: N-utilizing substance A protein (NusA), S1-like RNA-binding domain. S1-like ...
133-199
2.36e-24
S1_NusA: N-utilizing substance A protein (NusA), S1-like RNA-binding domain. S1-like RNA-binding domains are found in a wide variety of RNA-associated proteins. NusA is a transcription elongation factor containing an N-terminal catalytic domain and three RNA binding domains (RBD's). The RBD's include one S1 domain and two KH domains that form an RNA binding surface. DNA transcription by RNA polymerase (RNAP) includes three phases - initiation, elongation, and termination. During initiation, sigma factors bind RNAP and target RNAP to specific promoters. During elongation, N-utilization substances (NusA, B, E, and G) replace sigma factors and regulate pausing, termination, and antitermination. NusA is cold-shock-inducible.
Pssm-ID: 239902 [Multi-domain] Cd Length: 67 Bit Score: 94.82 E-value: 2.36e-24
NusA family KH domain protein, archaeal; This model represents a family of archaeal proteins ...
248-340
3.72e-11
NusA family KH domain protein, archaeal; This model represents a family of archaeal proteins found in a single copy per genome. It contains two KH domains (pfam00013) and is most closely related to the central region bacterial NusA, a transcription termination factor named for its iteraction with phage lambda protein N in E. coli. The proteins required for antitermination by N include NusA, NusB, nusE (ribosomal protein S10), and nusG. This system, on the whole, appears not to be present in the Archaea.
Pssm-ID: 273892 Cd Length: 141 Bit Score: 60.50 E-value: 3.72e-11
second type II K-homology (KH) RNA-binding domain found in archaeal probable transcription ...
280-340
1.93e-04
second type II K-homology (KH) RNA-binding domain found in archaeal probable transcription termination protein NusA and similar proteins; NusA, also called N utilization substance protein A, is an essential multifunctional transcription elongation factor that is universally conserved among prokaryotes and archaea. It participates in both transcription termination and antitermination. NusA homologs consisting of only the two type II K-homology (KH) domains are widely conserved in archaea. Although their function remains unclear, it has been found that Aeropyrum pernix NusA strongly binds to a certain CU-rich sequence near a termination signal. Archaeal NusA may have retained some functions of bacterial NusA, including ssRNA-binding ability. This model corresponds to the second KH domain of NusA mainly found in archaea.
Pssm-ID: 411788 [Multi-domain] Cd Length: 67 Bit Score: 39.15 E-value: 1.93e-04
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.
Click on the triangle to view details about the feature, including a multiple sequence alignment
of your query sequence and the protein sequences used to curate the domain model,
where hash marks (#) above the aligned sequences show the location of the conserved feature residues.
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.
Click here to see more details.
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
(labeled illustration) or all hits
(labeled illustration).
Domains are color coded according to superfamilies
to which they have been assigned. Hits with scores that pass a domain-specific threshold
(specific hits) are drawn in bright colors.
Others (non-specific hits) and
superfamily placeholders are drawn in pastel colors.
if a domain or superfamily has been annotated with functional sites (conserved features),
they are mapped to the query sequence and indicated through sets of triangles
with the same color and shade of the domain or superfamily that provides the annotation. Mouse over the colored bars or triangles to see descriptions of the domains and features.
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)
mapped to the query sequence.
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
(CDART).
Modify your query to search against a different database and/or use advanced search options
