biology

SPP1 holin family

SPP1 holin family is a biology 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 SPP1 holin family rather than just read about it. In short: The SPP1 Holin (SPP1 Holin) Family (TC# 1.E.31) consists of proteins of between 90 and 160 amino acyl residues (aas) in length that exhibit two transmembrane segments (TMSs). SPP1 is a double-stranded DNA phage that infects the Gram-positive bacteria.

Key takeaways

SPP1 holin family belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SPP1 holin family to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SPP1 holin family from memory before moving on to harder problems.

Reference excerpt

The SPP1 Holin (SPP1 Holin) Family (TC# 1.E.31) consists of proteins of between 90 and 160 amino acyl residues (aas) in length that exhibit two transmembrane segments (TMSs). SPP1 is a double-stranded DNA phage that infects the Gram-positive bacteria. Although annotated as holins, members of the SPP1 family are not yet functionally characterized. A representative list of proteins belonging to the SPP1 Holin family can be found in Transporter Classification Database.

See also Holin Lysin Transporter Classification Database

Further reading Aunpad, Ratchaneewan; Panbangred, Watanalai (2012-04-01). "Evidence for two putative holin-like peptides encoding genes of Bacillus pumilus strain WAPB4". Current Microbiology 64 (4): 343–348.doi:10.1007/s00284-011-0074-3. ISSN 1432-0991.PMID 22231453. Bon, J.; Mani, N.; Jayaswal, R. K. (1997-07-01). "Molecular analysis of lytic genes of bacteriophage 80 alpha of Staphylococcus aureus". Canadian Journal of Microbiology 43 (7): 612–616. ISSN 0008-4166.PMID 9246739. Durmaz, Evelyn; Klaenhammer, Todd R. (2007-02-01). "Abortive phage resistance mechanism AbiZ speeds the lysis clock to cause premature lysis of phage-infected Lactococcus lactis". Journal of Bacteriology 189(4): 1417–1425. doi:10.1128/JB.00904-06. ISSN 0021-9193. PMC 1797342. PMID 17012400. Krogh, S.; Jørgensen, S. T.; Devine, K. M. (1998-04-01). "Lysis genes of the Bacillus subtilis defective prophage PBSX". Journal of Bacteriology 180 (8): 2110–2117. ISSN 0021-9193. PMC 107137. PMID 9555893. Kyogoku, K.; Sekiguchi, J. (1996-02-02)."Cloning and sequencing of a new holin-encoding gene of Bacillus licheniformis". Gene 168 (1): 61–65. ISSN 0378-1119. PMID 8626066. Wang, I. N.; Smith, D. L.; Young, R. (2000-01-01). "Holins: the protein clocks of bacteriophage infections". Annual Review of Microbiology 54: 799–825.doi:10.1146/annurev.micro.54.1.799. ISSN 0066-4227.PMID 11018145.

References

As of this edit, this article uses content from "1.E.31 The SPP1 Holin (SPP1 Holin) Family", which is licensed in a way that permits reuse under the Creative Commons Attribution-ShareAlike 3.0 Unported License, but not under the GFDL. All relevant terms must be followed.

Worked examples

Example 1 — a first encounter with SPP1 holin family

Start with the simplest possible case. Write down what SPP1 holin family claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 SPP1 holin family 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 SPP1 holin family 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 SPP1 holin family

In research: SPP1 holin family appears in biology 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 SPP1 holin family 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: SPP1 holin family is common in secondary-school and first-year university syllabi. It links to neighbouring topics Holins, Integral membrane proteins, Membrane proteins, so understanding it makes those chapters shorter.
In everyday life: Look for SPP1 holin family 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 SPP1 holin family in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SPP1 holin family 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 SPP1 holin family out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SPP1 holin family in simple terms?

Why does SPP1 holin family matter?

Because it connects several biology 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 SPP1 holin family?

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 SPP1 holin family.