engineering

Oleate hydratase

Oleate hydratase is a engineering 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 Oleate hydratase rather than just read about it. In short: Oleate hydratase (EC 4.2.1.53) is an enzyme that catalyzes the conversion of oleic acid, a common monounsaturated fatty acid, into (R)-10-hydroxystearic acid. This reaction is a type of hydration, where a water molecule is added across the carbon-carbon double bond of oleic acid.

Key takeaways

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

Reference excerpt

Oleate hydratase (EC 4.2.1.53) is an enzyme that catalyzes the conversion of oleic acid, a common monounsaturated fatty acid, into (R)-10-hydroxystearic acid. This reaction is a type of hydration, where a water molecule is added across the carbon-carbon double bond of oleic acid. Oleate hydratase is primarily found in bacteria and plays a role in microbial fatty acid metabolism. This enzyme has attracted industrial interest because its product is used in the production of bioplastics, lubricants, surfactants, and other bio-based applications.

History and discovery The conversion of oleic acid into 10-hydroxystearic acid was first observed in 1962 in a bacterial strain later identified as Elizabethkingia meningoseptica. Scientists noticed that the product accumulated outside the cells, suggesting a specific enzyme was responsible. This enzyme was later named oleate hydratase. Early studies confirmed that the enzyme works by adding a water molecule to the double bond of oleic acid. In 2009, researchers isolated the enzyme for the first time, and in 2015, its crystal structure was solved. These studies confirmed the presence of FAD in the enzyme and helped explain how it carries out the hydration reaction with high specificity. This discovery marked the beginning of using oleate hydratase in biotechnology and industrial research.

Reaction and classification Oleate hydratase catalyzes a reversible reaction where oleic is converted into (R)-10-hydroxystearic acid by adding a water molecule. The chemical reaction can be written as: (R)-10-hydroxystearate ⇌ {\displaystyle \rightleftharpoons } oleate + H2O This enzyme belongs to the family of lyases, specifically the hydro-lyases, which are enzymes that break or form carbon-oxygen bonds. Its EC number is 4.2.1.53, and each part of this number describes its function:

“4” indicates it is a lyase (enzymes that break bonds down without using water or oxidation). “2” specifies that it acts on carbon-oxygen bonds. “1” shows it is a hydro-lyase, which adds or removes water. “53” is the unique number assigned to oleate hydratase.

Organisms Oleate hydratase is primarily produced by various bacterial species that metabolize fatty acids as part of their energy and survival processes. This enzyme has been found in several bacteria, especially those that live in environments rich in fatty acids such as soil and the human gut. These include species such as Elizabethkingia meningoseptica and Staphylococcus aureus. Many microbes use the enzyme as part of fatty acid metabolism or for producing hydroxylated fatty acids. These products can help bacteria survive in different environments or interact with host organisms.

Function In microbes, oleate hydratase connects fatty acid metabolism to other cellular pathways. By adding a hydroxyl group to fatty acids, it produces new molecules that can be used as:

Precursors for polymers or bioactive compounds. Modified energy storage molecules that have different properties (such as solubility) compared to regular fatty acids. These products can help bacteria survive environmental stress and adapt to different growth conditions.

Crystal structure The crystal structure of oleate hydratase has been studied in several bacterial species. These studies show that the enzyme often functions as a dimer, meaning it is made of two identical subunits that work together. The enzyme contains a hydrophobic pocket that helps the fatty acid substrate fit into the active site in the correct position. In many species, a flavin adenine dinucleotide (FAD) molecule is also found inside the structure. FAD is not always required for the reaction, it helps stabilize the overall structure of the enzyme and supports proper substrate binding.

Active site The active site contains hydrophobic regions that hold the fatty acid chain in place and align the double bond for the hydration reaction. Key amino acids, such as histidine or tyrosine (depending on the bacterial species), help activate the water molecule. The enzyme is also stereospecific, meaning it only produces the (R)-10-hydroxystearic acid form. The stereospecific nature of the active site is one of the key reasons why this enzyme is valuable for industrial and biochemical applications.

Industrial applications Oleate hydratase is important in biotechnology because it produces (R)-10-hydroxystearic acid, a useful compound made from natural fatty acids. This product is used in making eco-friendly materials such as bioplastics, bio-based lubricants, surfactants, and cosmetic ingredients. One thing about this enzyme is that it works under gentle conditions and does not require harsh chemicals, making it a cleaner and more sustainable option compared to traditional chemical methods.

References

Worked examples

Example 1 — a first encounter with Oleate hydratase

Start with the simplest possible case. Write down what Oleate hydratase claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Oleate hydratase 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 Oleate hydratase 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 Oleate hydratase

In research: Oleate hydratase appears in engineering 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 Oleate hydratase 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: Oleate hydratase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 4.2.1, Enzymes of unknown structure, so understanding it makes those chapters shorter.
In everyday life: Look for Oleate hydratase 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 Oleate hydratase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Oleate hydratase 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 Oleate hydratase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Oleate hydratase in simple terms?

Why does Oleate hydratase matter?

Because it connects several engineering 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 Oleate hydratase?

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 Oleate hydratase.