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Fix upstream and downstream sequence of sequence-info and delins process #81

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merged 7 commits into from
Dec 25, 2023

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nokara26
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I fixed the sequence-info and delins because error occurred when gene is transcribed from reverse strand and variant includes stop codon and upstream sequence from cds.

I found upstream and downstream sequence is not corrected when deletion is extended to outside of cds.
So I fix upstream sequence from cds-start and downstream sequence from cds-end, protein alteration type determinning process and delins process.

I executed lein run and lein run :slow and I confirmed all tests are passed.

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codecov bot commented Oct 31, 2023

Codecov Report

Attention: 71 lines in your changes are missing coverage. Please review.

Comparison is base (eade95f) 45.64% compared to head (bbd85b6) 46.45%.

Files Patch % Lines
src/varity/vcf_to_hgvs/protein.clj 41.80% 66 Missing and 5 partials ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##           master      #81      +/-   ##
==========================================
+ Coverage   45.64%   46.45%   +0.81%     
==========================================
  Files          16       16              
  Lines        2007     2090      +83     
  Branches       66       70       +4     
==========================================
+ Hits          916      971      +55     
- Misses       1025     1049      +24     
- Partials       66       70       +4     

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@federkasten federkasten linked an issue Dec 21, 2023 that may be closed by this pull request
@nokara26 nokara26 marked this pull request as draft December 21, 2023 03:28
@nokara26 nokara26 marked this pull request as ready for review December 22, 2023 08:55
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Thanks PR. The strategy looks good to me! 🙆‍♂️

I pointed out some trivial points from a refactoring perspective.
Please check the comments.

Comment on lines 230 to 240
(defn- get-first-diff-aa-info
[pos ref-seq alt-seq]
(->> (map vector ref-seq alt-seq)
(drop (dec pos))
(map-indexed vector)
(drop-while (fn [[_ [r a]]] (= r a)))
first
((fn [[i [r a]]]
{:ppos (+ pos i)
:pref (str r)
:palt (str a)}))))
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Prettier to use varity.vcf-to-hgvs.common/diff-bases:

Suggested change
(defn- get-first-diff-aa-info
[pos ref-seq alt-seq]
(->> (map vector ref-seq alt-seq)
(drop (dec pos))
(map-indexed vector)
(drop-while (fn [[_ [r a]]] (= r a)))
first
((fn [[i [r a]]]
{:ppos (+ pos i)
:pref (str r)
:palt (str a)}))))
(defn- get-first-diff-aa-info
[pos ref-seq alt-seq]
(let [[ref-only alt-only offset _] (diff-bases ref-seq alt-seq (dec pos))]
(when (and (seq ref-only)
(seq alt-only))
{:ppos (+ pos offset)
:pref (str (first ref-only))
:palt (str (first alt-only))})))

with extending as follows:

(defn diff-bases
  ([s1 s2]
   ;; diff-bases original implementation
   )
  ([s1 s2 offset]
   (diff-bases (subs s1 offset) (subs s2 offset))))

[pref palt ppos])
[del ins offset _] (diff-bases pref palt)
ndel (count del)
include-ter-site? (if ref-include-ter-site
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Suggested change
include-ter-site? (if ref-include-ter-site
alt-retain-ter-site? (if ref-include-ter-site

Do you think renaming it would make more sense?

Comment on lines 368 to 369
(-> (pstring/split-at seq (dec pos))
last
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@federkasten federkasten Dec 23, 2023

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Use subs:

Suggested change
(-> (pstring/split-at seq (dec pos))
last
(-> (subs seq (dec pos))

Comment on lines 292 to 294
(if ref-include-ter-site
:indel
:frame-shift))
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Try using cond to expand nesting from L287.

(some (fn [[_ e]] (when (<= e %) e)) (reverse alt-exon-ranges*)))]
{:ref-exon-seq ref-exon-seq1
:ref-prot-seq (codon/amino-acid-sequence (cond-> ref-exon-seq1
(if ref-include-ter-site
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The apply-offset function has gotten a bit too complicated. Please split it into a new function and simplify the implementation 🙏

[ref alt]
(or (and (= 1 (count alt))
(= (first ref) (first alt)))
(and (not (= 1 (count ref) (count alt)))
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Suggested change
(and (not (= 1 (count ref) (count alt)))
(and (not= 1 (count ref) (count alt))

Equivalent?

Comment on lines 84 to 99
(defn- is-deletion-variant?
[ref alt]
(or (and (= 1 (count alt))
(= (first ref) (first alt)))
(and (not (= 1 (count ref) (count alt)))
(not= (first ref) (first alt)))))

(defn- cds-start-upstream-to-cds-variant?
[cds-start pos ref]
(and (< pos cds-start)
(<= cds-start (dec (+ pos (count ref))))))

(defn- cds-to-cds-end-downstream-variant?
[cds-end pos ref]
(and (<= pos cds-end)
(< cds-end (dec (+ pos (count ref))))))
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Please add simple tests for these functions 🙏

ter-site-adjusted-alt-seq (make-ter-site-adjusted-alt-seq alt-exon-seq alt-up-exon-seq alt-down-exon-seq
strand cds-start cds-end pos ref)
ref-include-ter-site (include-ter-site? rg pos ref)
apply-offset* (apply-offset pos ref alt alt-exon-ranges* ref-include-ter-site)]
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apply-offset and apply-offset* become more readable when you use the partial function.

(defn- is-deletion-variant?
[ref alt]
(or (and (= 1 (count alt))
(= (first ref) (first alt)))
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It's a tricky condition. How about checking the length of ref?

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Thank you. LGTM 🙆‍♂️

@federkasten federkasten merged commit a9d0829 into master Dec 25, 2023
31 checks passed
@federkasten federkasten deleted the fix/seq-info-and-delins branch December 25, 2023 09:28
@nokara26 nokara26 mentioned this pull request Dec 25, 2023
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Incorrect translation for unaffected stop codon
2 participants