Target type: cellularcomponent
Organized structure of distinctive morphology and function, not bounded by a lipid bilayer membrane. Includes ribosomes, the cytoskeleton and chromosomes. [GOC:go_curators]
Non-membrane-bounded organelles are cellular structures that lack a surrounding lipid bilayer membrane. These organelles are essential for a wide range of cellular processes, including protein synthesis, gene expression, and energy production.
Key characteristics of non-membrane-bounded organelles include:
- **Absence of a membrane**: This distinguishes them from membrane-bound organelles like the nucleus, mitochondria, and endoplasmic reticulum.
- **Association with other structures**: Often, these organelles are associated with other cellular components, such as the cytoskeleton or the nuclear matrix.
- **Specific functions**: Each type of non-membrane-bounded organelle has a distinct and essential role in the cell's functioning.
Examples of non-membrane-bounded organelles include:
- **Ribosomes**: These are responsible for protein synthesis, translating the genetic code from messenger RNA into amino acid chains.
- **Nucleolus**: This structure within the nucleus is the site of ribosome biogenesis.
- **Centrioles**: These cylindrical structures are involved in cell division, organizing microtubules for spindle formation.
- **Proteasomes**: These are protein complexes that degrade damaged or unnecessary proteins.
- **Centromeres**: These regions on chromosomes serve as attachment points for microtubules during cell division.
The lack of a membrane allows these organelles to interact directly with the surrounding cytoplasm and other cellular components, facilitating their specific roles in cellular processes.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Nuclear factor erythroid 2-related factor 2 | A nuclear factor erythroid 2-related factor 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q16236] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| melatonin | acetamides; tryptamines | anticonvulsant; central nervous system depressant; geroprotector; hormone; human metabolite; immunological adjuvant; mouse metabolite; radical scavenger | |
| sulforaphane | sulforaphane : An isothiocyanate having a 4-(methylsulfinyl)butyl group attached to the nitrogen. sulforaphane: from Cardaria draba L. | isothiocyanate; sulfoxide | antineoplastic agent; antioxidant; EC 3.5.1.98 (histone deacetylase) inhibitor; plant metabolite |
| dimethylformamide | Dimethylformamide: A formamide in which the amino hydrogens are replaced by methyl groups. N,N-dimethylformamide : A member of the class of formamides that is formamide in which the amino hydrogens are replaced by methyl groups. | formamides; volatile organic compound | geroprotector; hepatotoxic agent; polar aprotic solvent |
| iberin | isothiocyanate; sulfoxide | apoptosis inducer; plant metabolite; quorum sensing inhibitor | |
| oleanolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | plant metabolite | |
| 2-tert-butylhydroquinone | 2-tert-butylhydroquinone : A member of the class of hydroquinones in which one of the ring hydrogens of hydroquinone is replaced by a tert-butyl group. 2-tert-butylhydroquinone: an anticarcinogenic and chemopreventive agent | hydroquinones | food antioxidant |
| brusatol | brusatol: quassinoid from B. javanica; structure | triterpenoid | |
| hei 712 | organofluorine compound; quinolone | ||
| 2-(5-Chlorobenzo[b]thiophen-3-yl)acetic acid | 1-benzothiophenes | ||
| alyssin | sulfoxide | ||
| bardoxolone methyl | methyl 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-oate: structure in first source | cyclohexenones | |
| resveratrol | trans-resveratrol : A resveratrol in which the double bond has E configuration. | resveratrol | antioxidant; phytoalexin; plant metabolite; quorum sensing inhibitor; radical scavenger |
| dimethyl fumarate | diester; enoate ester; methyl ester | antipsoriatic; immunomodulator | |
| (1e,4e)-1,5-bis(2-methoxyphenyl)penta-1,4-dien-3-one | |||
| curcumin | curcumin : A beta-diketone that is methane in which two of the hydrogens are substituted by feruloyl groups. A natural dyestuff found in the root of Curcuma longa. Curcumin: A yellow-orange dye obtained from tumeric, the powdered root of CURCUMA longa. It is used in the preparation of curcuma paper and the detection of boron. Curcumin appears to possess a spectrum of pharmacological properties, due primarily to its inhibitory effects on metabolic enzymes. | aromatic ether; beta-diketone; diarylheptanoid; enone; polyphenol | anti-inflammatory agent; antifungal agent; antineoplastic agent; biological pigment; contraceptive drug; dye; EC 1.1.1.205 (IMP dehydrogenase) inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor; EC 1.8.1.9 (thioredoxin reductase) inhibitor; EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; flavouring agent; food colouring; geroprotector; hepatoprotective agent; immunomodulator; iron chelator; ligand; lipoxygenase inhibitor; metabolite; neuroprotective agent; nutraceutical; radical scavenger |
| umi-77 | UMI-77: an Mcl-1 inhibitor; structure in first source | ||
| 2,6-bis(2,5-dimethoxybenzylidene)cyclohexanone | 2,6-bis(2,5-dimethoxybenzylidene)cyclohexanone: an anti-inflammatory agent that down-regulates cyclooxygenase-2 expression; structure in first source | ||
| strigol | strigol : A strigolactone in which the tricyclic lactone moiety bears a hydroxy substitutuent at the position para to the gem-dimethyl group. strigol: a strigolactone from roots of various PLANTS; it stimulates seed germination of parasitic STRIGA and OROBANCHE; structure in first source | indenofuran; secondary alcohol; strigolactone | |
| hylin | |||
| 6-methylsulfinylhexyl isothiocyanate | 6-(Methylsulfinyl)hexyl isothiocyanate: showed a dose-dependent inhibition of LPS-induced nitric oxide (NO), iNOS mRNA and protein. | sulfoxide | |
| dimethoxycurcumin | dimethoxycurcumin: has antineoplsatic activity; structure in first source | ||
| (1S,2R)-2-[[(1S)-1-[(1,3-dioxo-2-isoindolyl)methyl]-3,4-dihydro-1H-isoquinolin-2-yl]-oxomethyl]-1-cyclohexanecarboxylic acid | LH601A: inhibits the interaction between KEAP1 and NRF2; structure in first source | phthalimides |