Summary: Rel homology DNA-binding domain

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Wikipedia: Rel homology domain
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Rel homology domain Edit Wikipedia article

Rel homology domain (RHD)

Top view of the crystallographic structure of a homodimer of the NFKB1 protein (green and magenta) bound to DNA (brown).^[1]

Identifiers

Symbol

RHD

Available protein structures:
Pfam	structures
PDB	RCSB PDB; PDBe; PDBj
PDBsum	structure summary

The Rel homology domain (RHD) is a protein domain found in a family of eukaryotic transcription factors, which includes NF-κB, NFAT, among others. Some of these transcription factors appear to form multi-protein DNA-bound complexes.^[2] Phosphorylation of the RHD appears to play a role in the regulation of some of these transcription factors, acting to modulate the expression of their target genes.^[3] The RHD is composed of two immunoglobulin-like beta barrel subdomains that grip the DNA in the major groove. The N-terminal specificity domain resembles the core domain of the p53 transcription factor, and contains a recognition loop that interacts with DNA bases. The C-terminal dimerization domain contains the site for interaction with I-kappaB.^[1]

References

^ ^a ^b PDB: 1SVC;Müller CW, Rey FA, Sodeoka M, Verdine GL, Harrison SC (January 1995). "Structure of the NF-kappa B p50 homodimer bound to DNA". Nature. 373 (6512): 311–7. doi:10.1038/373311a0. PMID 7830764.
^ Wolberger C (October 1998). "Combinatorial transcription factors". Curr. Opin. Genet. Dev. 8 (5): 552–9. doi:10.1016/S0959-437X(98)80010-5. PMID 9794820.
^ Anrather J, Racchumi G, Iadecola C (January 2005). "cis-acting, element-specific transcriptional activity of differentially phosphorylated nuclear factor-kappa B". J. Biol. Chem. 280 (1): 244–52. doi:10.1074/jbc.M409344200. PMID 15516339.

This article incorporates text from the public domain Pfam and InterPro IPR011539

Transcription factors and intracellular receptors

(1) Basic domains

(1.1) Basic leucine zipper (bZIP)	Activating transcription factor AATF 1 2 3 4 5 6 7 AP-1 c-Fos FOSB FOSL1 FOSL2 JDP2 c-Jun JUNB JunD BACH 1 2 BATF BLZF1 C/EBP α β γ δ ε ζ CREB 1 3 L1 CREM DBP DDIT3 GABPA GCN4 HLF MAF B F G K NFE 2 L1 L2 L3 NFIL3 NRL NRF 1 2 3 XBP1
(1.2) Basic helix-loop-helix (bHLH)	ATOH1 AhR AHRR ARNT ASCL1 BHLH 2 3 9 ARNTL ARNTL ARNTL2 CLOCK EPAS1 FIGLA HAND 1 2 HES 5 6 HEY 1 2 L HES1 HIF 1A 3A ID 1 2 3 4 LYL1 MESP2 MXD4 MYCL1 MYCN Myogenic regulatory factors MyoD Myogenin MYF5 MYF6 Neurogenins 1 2 3 NeuroD 1 2 NPAS 1 2 3 OLIG 1 2 Pho4 Scleraxis SIM 1 2 TAL 1 2 Twist USF1
(1.3) bHLH-ZIP	AP-4 MAX MXD3 MITF MNT MLX MXI1 Myc SREBP 1 2
(1.4) NF-1	NFI A B C X SMAD R-SMAD 1 2 3 5 9 I-SMAD 6 7 4)
(1.5) RF-X	RFX 1 2 3 4 5 6 ANK
(1.6) Basic helix-span-helix (bHSH)	AP-2 α β γ δ ε

(2) Zinc finger DNA-binding domains

(2.1) Nuclear receptor (Cys₄)

subfamily 1	Thyroid hormone α β CAR FXR LXR α β PPAR α β/δ γ PXR RAR α β γ ROR α β γ Rev-ErbA α β VDR
subfamily 2	COUP-TF (I II Ear-2 HNF4 α γ PNR RXR α β γ Testicular receptor 2 4 TLX
subfamily 3	Steroid hormone Androgen Estrogen α β Glucocorticoid Mineralocorticoid Progesterone Estrogen related α β γ
subfamily 4	NUR NGFIB NOR1 NURR1
subfamily 5	LRH-1 SF1
subfamily 6	GCNF
subfamily 0	DAX1 SHP

(2.2) Other Cys₄

GATA
- 1
- 2
- 3
- 4
- 5
- 6
MTA
- 1
- 2
- 3
TRPS1

(2.3) Cys₂His₂

General transcription factors
- TFIIA
- TFIIB
- TFIID
- TFIIE
  - 1
  - 2
- TFIIF
- 1
- 2
  - TFIIH
  - 1
  - 2
  - 4
  - 2I
  - 3A
  - 3C1
  - 3C2

ATBF1
BCL
- 6
- 11A
- 11B
CTCF
E4F1
EGR
- 1
- 2
- 3
- 4
ERV3
GFI1
GLI-Krüppel family
- 1
- 2
- 3
- REST
- S1
- S2
- YY1
HIC
- 1
- 2
HIVEP
- 1
- 2
- 3
IKZF
- 1
- 2
- 3
ILF
- 2
- 3
KLF
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 17
MTF1
MYT1
OSR1
PRDM9
SALL
- 1
- 2
- 3
- 4
SP
- 1
- 2
- 4
- 7
- 8
TSHZ3
WT1
Zbtb7
- 7A
- 7B
ZBTB
- 11
- 16
- 17
- 20
- 32
- 33
- 40
zinc finger
- 3
- 7
- 9
- 10
- 19
- 22
- 24
- 33B
- 34
- 35
- 41
- 43
- 44
- 51
- 74
- 143
- 146
- 148
- 165
- 202
- 217
- 219
- 238
- 239
- 259
- 267
- 268
- 281
- 295
- 300
- 318
- 330
- 346
- 350
- 365
- 366
- 384
- 423
- 451
- 452
- 471
- 593
- 638
- 644
- 649
- 655

(2.4) Cys₆

HIVEP1

(2.5) Alternating composition

AIRE
DIDO1
GRLF1
ING
- 1
- 2
- 4
JARID
- 1A
- 1B
- 1C
- 1D
- 2
JMJD1B

(2.6) WRKY

WRKY

(3) Helix-turn-helix domains

(3.1) Homeodomain	ARX CDX 1 2 CRX CUTL1 DBX 1 2 DLX 3 4 5 EMX 1 2 EN 1 2 FHL 1 2 3 HESX1 HHEX HLX Homeobox A1 A2 A3 A4 A5 A7 A9 A10 A11 A13 B1 B2 B3 B4 B5 B6 B7 B8 B9 B13 C4 C5 C6 C8 C9 C10 C11 C12 C13 D1 D3 D4 D8 D9 D10 D11 D12 D13 HOPX IRX 1 2 3 4 5 6 MKX LMX 1A 1B MEIS 1 2 MEOX2 MNX1 MSX 1 2 NANOG NKX 2-1 2-2 2-3 2-5 3-1 3-2 6-1 6-2 NOBOX PBX 1 2 3 PHF 1 3 6 8 10 16 17 20 21A PHOX 2A 2B PITX 1 2 3 POU domain PIT-1 BRN-3: A B C Octamer transcription factor: 1 2 3/4 6 7 11 OTX 1 2 PDX1 SATB2 SHOX2 SIX 1 2 3 4 5 VAX1 ZEB 1 2
(3.2) Paired box	PAX 1 2 3 4 5 6 7 8 9 PRRX 1 2 RAX
(3.3) Fork head / winged helix	E2F 1 2 3 4 5 FOX proteins A1 A2 A3 C1 C2 D3 D4 E1 E3 F1 G1 H1 I1 J1 J2 K1 K2 L2 M1 N1 N3 O1 O3 O4 P1 P2 P3 P4
(3.4) Heat shock factors	HSF 1 2 4
(3.5) Tryptophan clusters	ELF 2 4 5 EGF ELK 1 3 4 ERF ETS 1 2 ERG SPIB ETV 1 4 5 6 FLI1 Interferon regulatory factors 1 2 3 4 5 6 7 8 MYB MYBL2
(3.6) TEA domain	transcriptional enhancer factor 1 2 3 4

(4) β-Scaffold factors with minor groove contacts

(4.1) Rel homology region	NF-κB NFKB1 NFKB2 REL RELA RELB NFAT C1 C2 C3 C4 5
(4.2) STAT	STAT 1 2 3 4 5 6
(4.3) p53	p53 TBX 1 2 3 5 19 21 22 TBR1 TBR2 TFT MYRF TP63
(4.4) MADS box	Mef2 A B C D SRF
(4.6) TATA-binding proteins	TBP TBPL1
(4.7) High-mobility group	BBX HMGB 1 2 3 4 HMGN 1 2 3 4 HNF 1A 1B LEF1 SOX 1 2 3 4 5 6 8 9 10 11 12 13 14 15 18 21 SRY SSRP1 TCF 3 4 TOX 1 2 3 4
(4.9) Grainyhead	TFCP2
(4.10) Cold-shock domain	CSDA YBX1
(4.11) Runt	CBF CBFA2T2 CBFA2T3 RUNX1 RUNX2 RUNX3 RUNX1T1

(0) Other transcription factors

(0.2) HMGI(Y)	HMGA 1 2 HBP1
(0.3) Pocket domain	Rb RBL1 RBL2
(0.5) AP-2/EREBP-related factors	Apetala 2 EREBP B3
(0.6) Miscellaneous	ARID 1A 1B 2 3A 3B 4A CAP IFI 16 35 MLL 2 3 T1 MNDA NFY A B C Rho/Sigma

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Rel homology DNA-binding domain Provide feedback

Proteins containing the Rel homology domain (RHD) are eukaryotic transcription factors. The RHD is composed of two structural domains. This is the N-terminal DNA-binding domain that is similar to that found in P53. The C-terminal domain has an immunoglobulin-like fold (See PF16179) that functions as a dimerisation domain [1-2].

Literature references

Moorthy AK, Huang DB, Wang VY, Vu D, Ghosh G;, J Mol Biol. 2007;373:723-734.: X-ray structure of a NF-kappaB p50/RelB/DNA complex reveals assembly of multiple dimers on tandem kappaB sites. PUBMED:17869269 EPMC:17869269

External database links

HOMSTRAD:	RHD
PROSITE:	PDOC00924
SCOP:	1svc

This tab holds annotation information from the InterPro database.

InterPro entry IPR011539

The Rel homology domain (RHD) is found in a family of eukaryotic transcription factors, which includes NF-kappaB, Dorsal, Relish, NFAT, among others. The RHD is composed of two structural domains: the N-terminal DNA binding domain that is similar to that found in P53, the C-terminal domain has an immunoglobulin-like fold (See ) that functions as a dimerisation domain. This entry represents the N-terminal DNA binding domain [PUBMED:17869269].

Some of these transcription factors appear to form multi-protein DNA-bound complexes [PUBMED:9794820]. Phosphorylation of the RHD appears to play a role in the regulation of some of these transcription factors, acting to modulate the expression of their target genes [PUBMED:15516339]. The RHD is composed of two immunoglobulin-like beta-barrel subdomains that grip the DNA in the major groove. The N-terminal specificity domain resembles the core domain of the p53 transcription factor, and contains a recognition loop that interacts with DNA bases; the C-terminal dimerisation domain contains the site for interaction with I-kappaB [PUBMED:7830764].

Gene Ontology

The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.

Molecular function	DNA binding (GO:0003677)
Molecular function	DNA-binding transcription factor activity (GO:0003700)
Biological process	regulation of transcription, DNA-templated (GO:0006355)

Domain organisation

Below is a listing of the unique domain organisations or architectures in which this domain is found. More...

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Pfam Clan

This family is a member of clan P53-like (CL0073), which has the following description:

This clan contains a variety of DNA-binding domains that contain an immunoglobulin-like fold. It includes the DNA-binding domains of NF-kappaB, NFAT, p53, STAT-1, the T-domain and the Runt domain [1].

The clan contains the following 9 members:

CEP1-DNA_bind LAG1-DNAbind NDT80_PhoG P53 PAD_M RHD_DNA_bind Runt STAT_bind T-box

Alignments

We store a range of different sequence alignments for families. As well as the seed alignment from which the family is built, we provide the full alignment, generated by searching the sequence database (reference proteomes) using the family HMM. We also generate alignments using four representative proteomes (RP) sets, the UniProtKB sequence database, the NCBI sequence database, and our metagenomics sequence database. More...

There are various ways to view or download the sequence alignments that we store. We provide several sequence viewers and a plain-text Stockholm-format file for download.

Alignment types

We make a range of alignments for each Pfam-A family:

seed: the curated alignment from which the HMM for the family is built
full: the alignment generated by searching the sequence database using the HMM
RP15/RP35/RP55/RP75: Representative Proteomes (RPs) at 15%, 35%, 55% and 75% co-membership thresholds
UniProt: alignment generated by searching the UniProtKB sequence database using the family HMM
NCBI: alignment generated by searching the NCBI sequence database using the family HMM
meta: alignment generated by searching the metagenomics sequence database using the family HMM

Viewing

You can see the alignments as HTML or in three different sequence viewers:

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Downloading

You may find that large alignments cause problems for the viewers and the reformatting tool, so we also provide all alignments in Stockholm format. You can download either the plain text alignment, or a gzipped version of it.

View options

We make a range of alignments for each Pfam-A family. You can see a description of each above. You can view these alignments in various ways but please note that some types of alignment are never generated while others may not be available for all families, most commonly because the alignments are too large to handle.

	Seed (21)	Full (3326)	Representative proteomes				UniProt (5710)	NCBI (10527)	Meta (0)
	Seed (21)	Full (3326)	RP15 (310)	RP35 (811)	RP55 (2061)	RP75 (3314)	UniProt (5710)	NCBI (10527)	Meta (0)
Jalview	View	View	View	View	View	View	View	View
HTML	View	View
PP/heatmap	₁	View

¹Cannot generate PP/Heatmap alignments for seeds; no PP data available

Key: available, not generated, — not available.

Format an alignment

	Seed (21)	Full (3326)	Representative proteomes				UniProt (5710)	NCBI (10527)	Meta (0)
	Seed (21)	Full (3326)	RP15 (310)	RP35 (811)	RP55 (2061)	RP75 (3314)	UniProt (5710)	NCBI (10527)	Meta (0)
Alignment:
Format:
Order:	Tree Alphabetical
Sequence:	Inserts lower case All upper case
Gaps:
Download/view:	Download View

Download options

We make all of our alignments available in Stockholm format. You can download them here as raw, plain text files or as gzip-compressed files.

	Seed (21)	Full (3326)	Representative proteomes				UniProt (5710)	NCBI (10527)	Meta (0)
	Seed (21)	Full (3326)	RP15 (310)	RP35 (811)	RP55 (2061)	RP75 (3314)	UniProt (5710)	NCBI (10527)	Meta (0)
Raw Stockholm	Download	Download	Download	Download	Download	Download	Download	Download
Gzipped	Download	Download	Download	Download	Download	Download	Download	Download

You can also download a FASTA format file containing the full-length sequences for all sequences in the full alignment.

HMM logo

HMM logos is one way of visualising profile HMMs. Logos provide a quick overview of the properties of an HMM in a graphical form. You can see a more detailed description of HMM logos and find out how you can interpret them here. More...

Trees

This page displays the phylogenetic tree for this family's seed alignment. We use FastTree to calculate neighbour join trees with a local bootstrap based on 100 resamples (shown next to the tree nodes). FastTree calculates approximately-maximum-likelihood phylogenetic trees from our seed alignment.

Note: You can also download the data file for the tree.

Curation and family details

This section shows the detailed information about the Pfam family. You can see the definitions of many of the terms in this section in the glossary and a fuller explanation of the scoring system that we use in the scores section of the help pages.

Curation

Seed source:

SCOP

Previous IDs:

RHD;

Type:

Domain

Sequence Ontology:

SO:0000417

Author:

Bateman A

, Eberhardt R

Number in seed:

21

Number in full:

3326

Average length of the domain:

161.00 aa

Average identity of full alignment:

38 %

Average coverage of the sequence by the domain:

19.46 %

HMM information

HMM build commands:

build method: hmmbuild -o /dev/null HMM SEED

search method: hmmsearch -Z 47079205 -E 1000 --cpu 4 HMM pfamseq

Model details:

Parameter	Sequence	Domain
Gathering cut-off	19.7	19.7
Trusted cut-off	19.7	20.2
Noise cut-off	19.6	19.6

Model length:

169

Family (HMM) version:

23

Download:

download the raw HMM for this family

Species distribution

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Colour assignments

Archea	Eukaryota
Bacteria	Other sequences
Viruses	Unclassified
Viroids	Unclassified sequence

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This visualisation provides a simple graphical representation of the distribution of this family across species. You can find the original interactive tree in the adjacent tab. More...

This chart is a modified "sunburst" visualisation of the species tree for this family. It shows each node in the tree as a separate arc, arranged radially with the superkingdoms at the centre and the species arrayed around the outermost ring.

How the sunburst is generated

The tree is built by considering the taxonomic lineage of each sequence that has a match to this family. For each node in the resulting tree, we draw an arc in the sunburst. The radius of the arc, its distance from the root node at the centre of the sunburst, shows the taxonomic level ("superkingdom", "kingdom", etc). The length of the arc represents either the number of sequences represented at a given level, or the number of species that are found beneath the node in the tree. The weighting scheme can be changed using the sunburst controls.

In order to reduce the complexity of the representation, we reduce the number of taxonomic levels that we show. We consider only the following eight major taxonomic levels:

superkingdom
kingdom
phylum
class
order
family
genus
species

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Segments of the tree are coloured approximately according to their superkingdom. For example, archeal branches are coloured with shades of orange, eukaryotes in shades of purple, etc. The colour assignments are shown under the sunburst controls. Where space allows, the name of the taxonomic level will be written on the arc itself.

As you move your mouse across the sunburst, the current node will be highlighted. In the top section of the controls panel we show a summary of the lineage of the currently highlighed node. If you pause over an arc, a tooltip will be shown, giving the name of the taxonomic level in the title and a summary of the number of sequences and species below that node in the tree.

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Unmapped species names

The tree is built by looking at each sequence in the full alignment for the family. We take the name of the species given by UniProt and try to map that to the full taxonomic tree from NCBI. In some cases, the name chosen by UniProt does not map to any node in the NCBI tree, perhaps because the chosen name is listed as a synonym or a misspelling in the NCBI taxonomy.

So that these nodes are not simply omitted from the sunburst tree, we group them together in a separate branch (or segment of the sunburst tree). Since we cannot determine the lineage for these unmapped species, we show all levels between the superkingdom and the species as "uncategorised".

Sub-species

Since we reduce the species tree to only the eight main taxonomic levels, sequences that are mapped to the sub-species level in the tree would not normally be shown. Rather than leave out these species, we map them instead to their parent species. So, for example, for sequences belonging to one of the Vibrio cholerae sub-species in the NCBI taxonomy, we show them instead as belonging to the species Vibrio cholerae.

Too many species/sequences

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Species trees

We show the species tree in one of two ways. For smaller trees we try to show an interactive representation, which allows you to select specific nodes in the tree and view them as an alignment or as a set of Pfam domain graphics.

Unfortunately we have found that there are problems viewing the interactive tree when the it becomes larger than a certain limit. Furthermore, we have found that Internet Explorer can become unresponsive when viewing some trees, regardless of their size. We therefore show a text representation of the species tree when the size is above a certain limit or if you are using Internet Explorer to view the site.

If you are using IE you can still load the interactive tree by clicking the "Generate interactive tree" button, but please be aware of the potential problems that the interactive species tree can cause.

Interactive tree

For all of the domain matches in a full alignment, we count the number that are found on all sequences in the alignment. This total is shown in the purple box.

We also count the number of unique sequences on which each domain is found, which is shown in green. Note that a domain may appear multiple times on the same sequence, leading to the difference between these two numbers.

Finally, we group sequences from the same organism according to the NCBI code that is assigned by UniProt, allowing us to count the number of distinct sequences on which the domain is found. This value is shown in the pink boxes.

We use the NCBI species tree to group organisms according to their taxonomy and this forms the structure of the displayed tree. Note that in some cases the trees are too large (have too many nodes) to allow us to build an interactive tree, but in most cases you can still view the tree in a plain text, non-interactive representation. Those species which are represented in the seed alignment for this domain are highlighted.

You can use the tree controls to manipulate how the interactive tree is displayed:

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Interactions

There are 7 interactions for this family. More...

bZIP_1 Forkhead IRF TIG RHD_DNA_bind Thioredoxin TIG

Structures

For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the RHD_DNA_bind domain has been found. There are 80 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein sequence.

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Family: RHD_DNA_bind (PF00554)

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