Summary: MYND finger
This is the Wikipedia entry entitled "MYND zinc finger". More...
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MYND zinc finger Edit Wikipedia article
solution structure of zf-mynd domain of protein cbfa2ti (protein mtg8)
In molecular biology the MYND-type zinc finger domain is a conserved protein domain. The MYND domain (myeloid, Nervy, and DEAF-1) is present in a large group of proteins that includes RP-8 (PDCD2), Nervy, and predicted proteins from Drosophila, mammals, Caenorhabditis elegans, yeast, and plants. The MYND domain consists of a cluster of cysteine and histidine residues, arranged with an invariant spacing to form a potential zinc-binding motif. Mutating conserved cysteine residues in the DEAF-1 MYND domain does not abolish DNA binding, which suggests that the MYND domain might be involved in protein-protein interactions. Indeed, the MYND domain of ETO/MTG8 interacts directly with the N-CoR and SMRT co-repressors. Aberrant recruitment of co-repressor complexes and inappropriate transcriptional repression is believed to be a general mechanism of leukemogenesis caused by the t(8;21) translocations that fuse ETO with the acute myelogenous leukemia 1 (AML1) protein. ETO has been shown to be a co-repressor recruited by the promyelocytic leukemia zinc finger (PLZF) protein. A divergent MYND domain present in the adenovirus E1A binding protein BS69 was also shown to interact with N-CoR and mediate transcriptional repression. The current evidence suggests that the MYND motif in mammalian proteins constitutes a protein-protein interaction domain that functions as a co-repressor-recruiting interface.
- Feinstein PG, Kornfeld K, Hogness DS, Mann RS (June 1995). "Identification of homeotic target genes in Drosophila melanogaster including nervy, a proto-oncogene homologue". Genetics 140 (2): 573â86. PMC 1206636. PMID 7498738.
- Gross CT, McGinnis W (April 1996). "DEAF-1, a novel protein that binds an essential region in a Deformed response element". EMBO J. 15 (8): 1961â70. PMC 450115. PMID 8617243.
- Owens GP, Hahn WE, Cohen JJ (August 1991). "Identification of mRNAs associated with programmed cell death in immature thymocytes". Mol. Cell. Biol. 11 (8): 4177â88. PMC 361239. PMID 2072913.
- Lutterbach B, Sun D, Schuetz J, Hiebert SW (June 1998). "The MYND motif is required for repression of basal transcription from the multidrug resistance 1 promoter by the t(8;21) fusion protein". Mol. Cell. Biol. 18 (6): 3604â11. PMC 108942. PMID 9584201.
- Lutterbach B, Westendorf JJ, Linggi B, Patten A, Moniwa M, Davie JR, Huynh KD, Bardwell VJ, Lavinsky RM, Rosenfeld MG, Glass C, Seto E, Hiebert SW (December 1998). "ETO, a target of t(8;21) in acute leukemia, interacts with the N-CoR and mSin3 corepressors". Mol. Cell. Biol. 18 (12): 7176â84. PMC 109299. PMID 9819404.
- Melnick AM, Westendorf JJ, Polinger A, Carlile GW, Arai S, Ball HJ, Lutterbach B, Hiebert SW, Licht JD (March 2000). "The ETO protein disrupted in t(8;21)-associated acute myeloid leukemia is a corepressor for the promyelocytic leukemia zinc finger protein". Mol. Cell. Biol. 20 (6): 2075â86. doi:10.1128/MCB.20.6.2075-2086.2000. PMC 110824. PMID 10688654.
- Masselink H, Bernards R (March 2000). "The adenovirus E1A binding protein BS69 is a corepressor of transcription through recruitment of N-CoR". Oncogene 19 (12): 1538â46. doi:10.1038/sj.onc.1203421. PMID 10734313.
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LeBoeuf RD, Ban EM, Green MM, Stone AS, Propst SM, Blalock JE, Tauber JD; , J Biol Chem 1998;273:361-368.: Molecular cloning, sequence analysis, expression, and tissue distribution of suppressin, a novel suppressor of cell cycle entry. PUBMED:9417089 EPMC:9417089
Internal database links
|Similarity to PfamA using HHSearch:||zf-HIT zf-Mss51|
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR002893
Zinc finger (Znf) domains are relatively small protein motifs which contain multiple finger-like protrusions that make tandem contacts with their target molecule. Some of these domains bind zinc, but many do not; instead binding other metals such as iron, or no metal at all. For example, some family members form salt bridges to stabilise the finger-like folds. They were first identified as a DNA-binding motif in transcription factor TFIIIA from Xenopus laevis (African clawed frog), however they are now recognised to bind DNA, RNA, protein and/or lipid substrates [PUBMED:10529348, PUBMED:15963892, PUBMED:15718139, PUBMED:17210253, PUBMED:12665246]. Their binding properties depend on the amino acid sequence of the finger domains and of the linker between fingers, as well as on the higher-order structures and the number of fingers. Znf domains are often found in clusters, where fingers can have different binding specificities. There are many superfamilies of Znf motifs, varying in both sequence and structure. They display considerable versatility in binding modes, even between members of the same class (e.g. some bind DNA, others protein), suggesting that Znf motifs are stable scaffolds that have evolved specialised functions. For example, Znf-containing proteins function in gene transcription, translation, mRNA trafficking, cytoskeleton organisation, epithelial development, cell adhesion, protein folding, chromatin remodelling and zinc sensing, to name but a few [PUBMED:11179890]. Zinc-binding motifs are stable structures, and they rarely undergo conformational changes upon binding their target.
This entry represents MYND-type zinc finger domains. The MYND domain (myeloid, Nervy, and DEAF-1) is present in a large group of proteins that includes RP-8 (PDCD2), Nervy, and predicted proteins from Drosophila, mammals, Caenorhabditis elegans, yeast, and plants [PUBMED:7498738, PUBMED:8617243, PUBMED:2072913]. The MYND domain consists of a cluster of cysteine and histidine residues, arranged with an invariant spacing to form a potential zinc-binding motif [PUBMED:8617243]. Mutating conserved cysteine residues in the DEAF-1 MYND domain does not abolish DNA binding, which suggests that the MYND domain might be involved in protein-protein interactions [PUBMED:8617243]. Indeed, the MYND domain of ETO/MTG8 interacts directly with the N-CoR and SMRT co-repressors [PUBMED:9584201, PUBMED:9819404]. Aberrant recruitment of co-repressor complexes and inappropriate transcriptional repression is believed to be a general mechanism of leukemogenesis caused by the t(8;21) translocations that fuse ETO with the acute myelogenous leukemia 1 (AML1) protein. ETO has been shown to be a co-repressor recruited by the promyelocytic leukemia zinc finger (PLZF) protein [PUBMED:10688654]. A divergent MYND domain present in the adenovirus E1A binding protein BS69 was also shown to interact with N-CoR and mediate transcriptional repression [PUBMED:10734313]. The current evidence suggests that the MYND motif in mammalian proteins constitutes a protein-protein interaction domain that functions as a co-repressor-recruiting interface.
More information about these proteins can be found at Protein of the Month: Zinc Fingers [PUBMED:].
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Molecular function||zinc ion binding (GO:0008270)|
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Curation and family details
|Seed source:||Bateman A|
|Number in seed:||177|
|Number in full:||3934|
|Average length of the domain:||41.10 aa|
|Average identity of full alignment:||35 %|
|Average coverage of the sequence by the domain:||7.26 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||13|
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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 zf-MYND domain has been found. There are 26 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 seqence.
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