nitrogenase iron protein, partial [cyanobacterium endosymbiont of Epithemia catenata]
Protein Classification
nitrogenase iron protein; nitrogenase iron protein; nitrogenase iron protein; nitrogenase iron protein NifH( domain architecture ID 10787575)
nitrogenase iron protein NifH is the component II (iron protein) of nitrogenase that catalyzes the ATP-dependent reduction of dinitrogen to ammonia, which is central to the process of biological nitrogen fixation; nitrogenase iron protein NifH is the component II of nitogenase, which is responsible for the biological nitrogen fixation (reduction of molecular nitrogen to ammonia) in an ATP-dependent process; nitrogenase iron protein NifH is the component II of nitogenase, which is responsible for the biological nitrogen fixation (reduction of molecular nitrogen to ammonia) in an ATP-dependent process; nitrogenase iron protein NifH is the component II of nitogenase, which is responsible for the biological nitrogen fixation (reduction of molecular nitrogen to ammonia) in an ATP-dependent process
nitrogenase component II NifH; NifH gene encodes component II (iron protein) of nitrogenase. ...
1-253
1.08e-164
nitrogenase component II NifH; NifH gene encodes component II (iron protein) of nitrogenase. Nitrogenase is responsible for the biological nitrogen fixation, i.e. reduction of molecular nitrogen to ammonia. NifH consists of two oxygen-sensitive metallosulfur proteins: the mollybdenum-iron (alternatively, vanadium-iron or iron-iron) protein (commonly referred to as component 1), and the iron protein (commonly referred to as component 2). The iron protein is a homodimer, with an Fe4S4 cluster bound between the subunits and two ATP-binding domains. It supplies energy by ATP hydrolysis, and transfers electrons from reduced ferredoxin or flavodoxin to component 1 for the reduction of molecular nitrogen to ammonia.
Pssm-ID: 349759 Cd Length: 265 Bit Score: 455.82 E-value: 1.08e-164
nitrogenase iron protein; This model describes nitrogenase (EC 1.18.6.1) iron protein, also ...
1-253
5.65e-163
nitrogenase iron protein; This model describes nitrogenase (EC 1.18.6.1) iron protein, also called nitrogenase reductase or nitrogenase component II. This model includes molybdenum-iron nitrogenase reductase (nifH), vanadium-iron nitrogenase reductase (vnfH), and iron-iron nitrogenase reductase (anfH). The model excludes the homologous protein from the light-independent protochlorophyllide reductase. [Central intermediary metabolism, Nitrogen fixation]
Pssm-ID: 273538 Cd Length: 275 Bit Score: 451.84 E-value: 5.65e-163
Ni-sirohydrochlorin a,c-diamide reductive cyclase ATP-dependent reductase subunit; This family, ...
1-251
1.07e-129
Ni-sirohydrochlorin a,c-diamide reductive cyclase ATP-dependent reductase subunit; This family, very closely related to the nitrogenase iron protein, was identified as a subunit involved in biosynthesis of coenzyme F430 in archaeal methanogens and archaeal anaerobic methanotrophs.
Pssm-ID: 380202 Cd Length: 260 Bit Score: 367.28 E-value: 1.07e-129
nitrogenase component II NifH; NifH gene encodes component II (iron protein) of nitrogenase. ...
1-253
1.08e-164
nitrogenase component II NifH; NifH gene encodes component II (iron protein) of nitrogenase. Nitrogenase is responsible for the biological nitrogen fixation, i.e. reduction of molecular nitrogen to ammonia. NifH consists of two oxygen-sensitive metallosulfur proteins: the mollybdenum-iron (alternatively, vanadium-iron or iron-iron) protein (commonly referred to as component 1), and the iron protein (commonly referred to as component 2). The iron protein is a homodimer, with an Fe4S4 cluster bound between the subunits and two ATP-binding domains. It supplies energy by ATP hydrolysis, and transfers electrons from reduced ferredoxin or flavodoxin to component 1 for the reduction of molecular nitrogen to ammonia.
Pssm-ID: 349759 Cd Length: 265 Bit Score: 455.82 E-value: 1.08e-164
nitrogenase iron protein; This model describes nitrogenase (EC 1.18.6.1) iron protein, also ...
1-253
5.65e-163
nitrogenase iron protein; This model describes nitrogenase (EC 1.18.6.1) iron protein, also called nitrogenase reductase or nitrogenase component II. This model includes molybdenum-iron nitrogenase reductase (nifH), vanadium-iron nitrogenase reductase (vnfH), and iron-iron nitrogenase reductase (anfH). The model excludes the homologous protein from the light-independent protochlorophyllide reductase. [Central intermediary metabolism, Nitrogen fixation]
Pssm-ID: 273538 Cd Length: 275 Bit Score: 451.84 E-value: 5.65e-163
Ni-sirohydrochlorin a,c-diamide reductive cyclase ATP-dependent reductase subunit; This family, ...
1-251
1.07e-129
Ni-sirohydrochlorin a,c-diamide reductive cyclase ATP-dependent reductase subunit; This family, very closely related to the nitrogenase iron protein, was identified as a subunit involved in biosynthesis of coenzyme F430 in archaeal methanogens and archaeal anaerobic methanotrophs.
Pssm-ID: 380202 Cd Length: 260 Bit Score: 367.28 E-value: 1.07e-129
NifH family; This family contains the NifH (iron protein) of nitrogenase, L subunit (BchL/ChlL) ...
1-253
1.77e-111
NifH family; This family contains the NifH (iron protein) of nitrogenase, L subunit (BchL/ChlL) of the protochlorophyllide reductase, and the BchX subunit of the Chlorophyllide reductase. Members of this family use energy from ATP hydrolysis and transfer electrons through a Fe4-S4 cluster to other subunit for substrate reduction
Pssm-ID: 349761 Cd Length: 266 Bit Score: 321.24 E-value: 1.77e-111
L-subunit of protochlorophyllide reductase; This family of proteins contains BchL and ChlL. ...
1-252
4.49e-55
L-subunit of protochlorophyllide reductase; This family of proteins contains BchL and ChlL. Protochlorophyllide reductase catalyzes the reductive formation of chlorophyllide from protochlorophyllide during biosynthesis of chlorophylls and bacteriochlorophylls. Three genes, bchL, bchN and bchB, are involved in light-independent protochlorophyllide reduction in bacteriochlorophyll biosynthesis. In cyanobacteria, algae, and gymnosperms, three similar genes, chlL, chlN and chlB are involved in protochlorophyllide reduction during chlorophylls biosynthesis. BchL/chlL, bchN/chlN and bchB/chlB exhibit significant sequence similarity to the nifH, nifD and nifK subunits of nitrogenase, respectively. Nitrogenase catalyzes the reductive formation of ammonia from dinitrogen.
Pssm-ID: 349752 Cd Length: 267 Bit Score: 177.88 E-value: 4.49e-55
X-subunit of protochlorophyllide reductase; Chlorophyllide reductase converts chlorophylls ...
8-248
9.95e-35
X-subunit of protochlorophyllide reductase; Chlorophyllide reductase converts chlorophylls into bacteriochlorophylls by reducing the chlorin B-ring. This family contains the X subunit of this three-subunit enzyme. Sequence and structure similarity between bchX, protochlorophyllide reductase L subunit (bchL and chlL) and nitrogenase Fe protein (nifH gene) suggest their functional similarity. Members of the BchX family serve as the unique electron donors to their respective catalytic subunits (bchN-bchB, bchY-bchZ and nitrogenase component 1). Mechanistically, they hydrolyze ATP and transfer electrons through a Fe4-S4 cluster.
Pssm-ID: 349753 Cd Length: 329 Bit Score: 126.87 E-value: 9.95e-35
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
