The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was: waiting to be named.

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 205: Sex lethal, isoform B

Please note: GO annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

There are 12 GO terms relating to "molecular function"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
MRNA binding GO:0003729
Interacting selectively and non-covalently with messenger RNA (mRNA), an intermediate molecule between DNA and protein. mRNA includes UTR and coding sequences, but does not contain introns.
5 O76876 (/ISS) P16914 (/ISS) P16914 (/ISS) Q8IH14 (/ISS) Q95TA9 (/ISS)
MRNA binding GO:0003729
Interacting selectively and non-covalently with messenger RNA (mRNA), an intermediate molecule between DNA and protein. mRNA includes UTR and coding sequences, but does not contain introns.
3 P16914 (/NAS) P16914 (/NAS) Q95TA9 (/NAS)
Poly(U) RNA binding GO:0008266
Interacting selectively and non-covalently with a sequence of uracil residues in an RNA molecule.
3 P16914 (/IDA) P16914 (/IDA) P19339 (/IDA)
Translation repressor activity, mRNA regulatory element binding GO:0000900
Antagonizes the ribosome-mediated translation of mRNA into a polypeptide via direct binding (through a selective and non-covalent interaction) to nucleic acid.
2 P16914 (/NAS) P16914 (/NAS)
RNA binding GO:0003723
Interacting selectively and non-covalently with an RNA molecule or a portion thereof.
2 P16914 (/IDA) P16914 (/IDA)
Protein binding GO:0005515
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
2 P19339 (/IPI) Q20084 (/IPI)
Translation repressor activity, mRNA regulatory element binding GO:0000900
Antagonizes the ribosome-mediated translation of mRNA into a polypeptide via direct binding (through a selective and non-covalent interaction) to nucleic acid.
1 P19339 (/TAS)
Single-stranded RNA binding GO:0003727
Interacting selectively and non-covalently with single-stranded RNA.
1 Q20084 (/IDA)
MRNA 3'-UTR binding GO:0003730
Interacting selectively and non-covalently with the 3' untranslated region of an mRNA molecule.
1 P19339 (/IDA)
Poly-pyrimidine tract binding GO:0008187
Interacting selectively and non-covalently with any stretch of pyrimidines (cytosine or uracil) in an RNA molecule.
1 P19339 (/IDA)
Pre-mRNA binding GO:0036002
Interacting selectively and non-covalently with pre-messenger RNA (pre-mRNA), an intermediate molecule between DNA and protein that may contain introns and, at least in part, encodes one or more proteins. Introns are removed from pre-mRNA to form a mRNA molecule.
1 P19339 (/IDA)
MRNA 5'-UTR binding GO:0048027
Interacting selectively and non-covalently with the 5' untranslated region of an mRNA molecule.
1 P19339 (/IDA)

There are 35 GO terms relating to "biological process"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Germ cell development GO:0007281
The process whose specific outcome is the progression of an immature germ cell over time, from its formation to the mature structure (gamete). A germ cell is any reproductive cell in a multicellular organism.
2 P16914 (/NAS) P16914 (/NAS)
Negative regulation of oskar mRNA translation GO:0007319
Any process that stops, prevents or reduces the rate that oskar mRNAs are effectively translated into protein.
2 P16914 (/NAS) P16914 (/NAS)
Nervous system development GO:0007399
The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state.
2 P16914 (/NAS) P16914 (/NAS)
Central nervous system development GO:0007417
The process whose specific outcome is the progression of the central nervous system over time, from its formation to the mature structure. The central nervous system is the core nervous system that serves an integrating and coordinating function. In vertebrates it consists of the brain and spinal cord. In those invertebrates with a central nervous system it typically consists of a brain, cerebral ganglia and a nerve cord.
2 P16914 (/IMP) P16914 (/IMP)
Embryo development ending in birth or egg hatching GO:0009792
The process whose specific outcome is the progression of an embryo over time, from zygote formation until the end of the embryonic life stage. The end of the embryonic life stage is organism-specific and may be somewhat arbitrary; for mammals it is usually considered to be birth, for insects the hatching of the first instar larva from the eggshell.
2 P16914 (/NAS) P16914 (/NAS)
Negative regulation of mRNA 3'-end processing GO:0031441
Any process that stops, prevents, or reduces the frequency, rate or extent of mRNA 3'-end processing.
2 P16914 (/IDA) P16914 (/IDA)
Defense response to bacterium GO:0042742
Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism.
2 O76876 (/IMP) Q8IH14 (/IMP)
Regulation of alternative mRNA splicing, via spliceosome GO:0000381
Any process that modulates the frequency, rate or extent of alternative splicing of nuclear mRNAs.
1 P19339 (/IDA)
Regulation of alternative mRNA splicing, via spliceosome GO:0000381
Any process that modulates the frequency, rate or extent of alternative splicing of nuclear mRNAs.
1 Q20084 (/IMP)
Epithelial cell development GO:0002064
The process whose specific outcome is the progression of an epithelial cell over time, from its formation to the mature structure. An epithelial cell is a cell usually found in a two-dimensional sheet with a free surface.
1 Q20084 (/IMP)
Reciprocal meiotic recombination GO:0007131
The cell cycle process in which double strand breaks are formed and repaired through a double Holliday junction intermediate. This results in the equal exchange of genetic material between non-sister chromatids in a pair of homologous chromosomes. These reciprocal recombinant products ensure the proper segregation of homologous chromosomes during meiosis I and create genetic diversity.
1 P19339 (/TAS)
Imaginal disc growth GO:0007446
The increase in mass of imaginal discs by cell proliferation prior to metamorphosis. Imaginal discs are epithelial infoldings in the larvae of holometabolous insects that develop into adult structures (legs, antennae, wings, etc.) during metamorphosis from larval to adult form.
1 P19339 (/IMP)
Sex determination GO:0007530
Any process that establishes and transmits the specification of sexual status of an individual organism.
1 P19339 (/TAS)
Sex determination, primary response to X:A ratio GO:0007541
The developmental process in which an organism interprets its X to autosomal chromosomal complement.
1 P19339 (/TAS)
Sex differentiation GO:0007548
The establishment of the sex of an organism by physical differentiation.
1 P19339 (/TAS)
Dosage compensation GO:0007549
Compensating for the variation in the unpaired sex chromosome:autosome chromosome ratios between sexes by activation or inactivation of genes on one or both of the sex chromosomes.
1 P19339 (/TAS)
Oocyte differentiation GO:0009994
The process in which a relatively unspecialized immature germ cell acquires the specialized features of a mature female gamete.
1 P19339 (/IDA)
Negative regulation of translation GO:0017148
Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteins by the translation of mRNA or circRNA.
1 P19339 (/IDA)
Negative regulation of translation GO:0017148
Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteins by the translation of mRNA or circRNA.
1 P19339 (/IMP)
Somatic sex determination GO:0018993
The determination of sex and sexual phenotypes in an organism's soma.
1 P19339 (/TAS)
Female sex determination GO:0030237
The specification of female sex of an individual organism.
1 P19339 (/IMP)
Regulation of tube size GO:0035150
Ensuring that a tube is of the correct length and diameter. Tube size must be maintained not only during tube formation, but also throughout development and in some physiological processes.
1 Q20084 (/IMP)
Germ cell proliferation GO:0036093
The multiplication or reproduction of germ cells, reproductive cells in multicellular organisms, resulting in the expansion of a cell population.
1 Q95TA9 (/IMP)
Regulation of neuron differentiation GO:0045664
Any process that modulates the frequency, rate or extent of neuron differentiation.
1 Q20084 (/IMP)
Positive regulation of angiogenesis GO:0045766
Any process that activates or increases angiogenesis.
1 Q90407 (/IMP)
Positive regulation of smoothened signaling pathway GO:0045880
Any process that activates or increases the frequency, rate or extent of smoothened signaling.
1 P19339 (/IDA)
Regulation of mRNA splicing, via spliceosome GO:0048024
Any process that modulates the frequency, rate or extent of mRNA splicing via a spliceosomal mechanism.
1 P19339 (/TAS)
Negative regulation of mRNA splicing, via spliceosome GO:0048025
Any process that stops, prevents or reduces the rate or extent of mRNA splicing via a spliceosomal mechanism.
1 P19339 (/TAS)
Oogenesis GO:0048477
The complete process of formation and maturation of an ovum or female gamete from a primordial female germ cell. Examples of this process are found in Mus musculus and Drosophila melanogaster.
1 Q95TA9 (/IMP)
Oogenesis GO:0048477
The complete process of formation and maturation of an ovum or female gamete from a primordial female germ cell. Examples of this process are found in Mus musculus and Drosophila melanogaster.
1 P19339 (/TAS)
Regulation of neurogenesis GO:0050767
Any process that modulates the frequency, rate or extent of neurogenesis, the generation of cells in the nervous system.
1 F1R0S9 (/IMP)
Protein stabilization GO:0050821
Any process involved in maintaining the structure and integrity of a protein and preventing it from degradation or aggregation.
1 P19339 (/IDA)
Establishment of blood-brain barrier GO:0060856
Establishment of the barrier between the blood and the brain. The cells in the brain are packed tightly together preventing the passage of most molecules from the blood into the brain. Only lipid soluble molecules or those that are actively transported can pass through the blood-brain barrier.
1 Q95TA9 (/IMP)
Epithelium regeneration GO:1990399
The regrowth of lost or destroyed epithelium.
1 P19339 (/IMP)
Regulation of stem cell division GO:2000035
Any process that modulates the frequency, rate or extent of stem cell division.
1 P19339 (/IMP)

There are 6 GO terms relating to "cellular component"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
3 P16914 (/TAS) P16914 (/TAS) Q95TA9 (/TAS)
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
2 P16914 (/IDA) P16914 (/IDA)
Cajal body GO:0015030
A class of nuclear body, first seen after silver staining by Ramon y Cajal in 1903, enriched in small nuclear ribonucleoproteins, and certain general RNA polymerase II transcription factors; ultrastructurally, they appear as a tangle of coiled, electron-dense threads roughly 0.5 micrometers in diameter; involved in aspects of snRNP biogenesis; the protein coilin serves as a marker for Cajal bodies. Some argue that Cajal bodies are the sites for preassembly of transcriptosomes, unitary particles involved in transcription and processing of RNA.
2 P16914 (/IDA) P16914 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 P19339 (/IDA)
Nuclear speck GO:0016607
A discrete extra-nucleolar subnuclear domain, 20-50 in number, in which splicing factors are seen to be localized by immunofluorescence microscopy.
1 Q20084 (/IDA)
Protein-containing complex GO:0032991
A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together.
1 P19339 (/IPI)