chemistry

JQ1

JQ1 is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand JQ1 rather than just read about it. In short: JQ1 is a thienotriazolodiazepine and a potent inhibitor of the BET family of bromodomain proteins which include BRD2, BRD3, BRD4, and the testis-specific protein BRDT in mammals. BET inhibitors structurally similar to JQ1 are being tested in clinical trials for a variety of cancers including NUT midline carcinoma.

Key takeaways

JQ1 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect JQ1 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of JQ1 from memory before moving on to harder problems.

Reference excerpt

JQ1 is a thienotriazolodiazepine and a potent inhibitor of the BET family of bromodomain proteins which include BRD2, BRD3, BRD4, and the testis-specific protein BRDT in mammals. BET inhibitors structurally similar to JQ1 are being tested in clinical trials for a variety of cancers including NUT midline carcinoma. It was developed by the James Bradner laboratory at Brigham and Women's Hospital and named after chemist Jun Qi. The chemical structure was inspired by patent of similar BET inhibitors by Mitsubishi Tanabe Pharma. Structurally it is related to benzodiazepines. While widely used in laboratory applications, JQ1 is not itself being used in human clinical trials because it has a short half-life.

Efficacy in mouse models of cancer Interest in JQ1 as a cancer therapeutic stemmed from its ability to inhibit BRD4 and BRD3, both of which form fusion oncogenes that drive NUT midline carcinoma. Subsequent work demonstrated that a number of cancers including some forms of acute myelogenous leukemia (AML), multiple myeloma (MM), and acute lymphoblastic leukemia (ALL) were also highly sensitive to BET inhibitors.

In other applications JQ1 has also been investigated for other applications in the treatment of HIV infection, as a male contraceptive, and in slowing the progression of heart disease. JQ1 has been functionalized in numerous different studies of targeted protein degradation. For example, conjugation of JQ1 to phthalimide moieties such as that found in thalidomide recruits the E3 ubiquitin ligase cereblon (CRBN) to effect proteasomal degradation of BRD4. Monovalent degraders based on functionalizing JQ1 have also been discovered. Fusion of JQ1 to other molecules targeting specific genomic loci has been demonstrated to rewire transcription.

See also Male contraceptive CDD-2807 TDI-11861 YCT529

References

Illustrations

Worked examples

Example 1 — a first encounter with JQ1

Start with the simplest possible case. Write down what JQ1 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to JQ1 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about JQ1 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of JQ1

In research: JQ1 appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses JQ1 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: JQ1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Contraception for males, Experimental cancer drugs, Experimental methods of birth control, so understanding it makes those chapters shorter.
In everyday life: Look for JQ1 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study JQ1 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what JQ1 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain JQ1 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is JQ1 in simple terms?

Why does JQ1 matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study JQ1?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on JQ1.

JQ1