internal IEnumerable <OneKGenItem> ExtractItems(string vcfLine)
{
var splitLine = vcfLine.OptimizedSplit('\t');// we don't care about the many fields after info field
if (splitLine.Length < 8)
{
yield break;
}
Clear();
var chromosomeName = splitLine[VcfCommon.ChromIndex];
if (!_refNameDictionary.ContainsKey(chromosomeName))
{
yield break;
}
var chromosome = _refNameDictionary[chromosomeName];
var position = int.Parse(splitLine[VcfCommon.PosIndex]);//we have to get it from RSPOS in info
var refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
var infoFields = splitLine[VcfCommon.InfoIndex];
// parses the info fields and extract frequencies, ancestral allele, allele counts, etc.
var hasSymbolicAllele = altAlleles.Any(x => x.OptimizedStartsWith('<') && x.OptimizedEndsWith('>'));
if (hasSymbolicAllele)
{
yield break;
}
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
ParseInfoField(infoFields, hasSymbolicAllele);
for (var i = 0; i < altAlleles.Length; i++)
{
var(shiftedPos, shiftedRef, shiftedAlt) = VariantUtils.TrimAndLeftAlign(position, refAllele,
altAlleles[i], _sequenceProvider.Sequence);
yield return(new OneKGenItem(
chromosome,
shiftedPos,
shiftedRef,
shiftedAlt,
_ancestralAllele,
GetAlleleCount(_allAlleleCounts, i),
GetAlleleCount(_afrAlleleCounts, i),
GetAlleleCount(_amrAlleleCounts, i),
GetAlleleCount(_eurAlleleCounts, i),
GetAlleleCount(_easAlleleCounts, i),
GetAlleleCount(_sasAlleleCounts, i),
_allAlleleNumber,
_afrAlleleNumber,
_amrAlleleNumber,
_eurAlleleNumber,
_easAlleleNumber,
_sasAlleleNumber
));
}
}
public IVariant[] CreateVariants(IChromosome chromosome, int start, int end, string refAllele,
string[] altAlleles, IInfoData infoData, bool[] isDecomposed, bool isRecomposed, List <string>[] linkedVids, string globalMajorAllele)
{
string firstAltAllele = altAlleles[0];
bool isReference = globalMajorAllele != null;
bool isSymbolicAllele = IsSymbolicAllele(firstAltAllele);
var variantCategory = GetVariantCategory(firstAltAllele, isReference, isSymbolicAllele, infoData.SvType);
if (isReference)
{
return new[] { GetVariant(chromosome, start, end, refAllele, firstAltAllele, infoData, variantCategory, isDecomposed[0], isRecomposed, linkedVids?[0]?.ToArray(), globalMajorAllele) }
}
;
_sequenceProvider.LoadChromosome(chromosome);
var variants = new List <IVariant>();
for (var i = 0; i < altAlleles.Length; i++)
{
#if (!NI_ALLELE)
if (VcfCommon.IsNonInformativeAltAllele(altAlleles[i]))
{
continue;
}
#endif
bool isDecomposedVar = isDecomposed[i];
(int shiftedStart, string shiftedRef, string shiftedAlt) =
VariantUtils.TrimAndLeftAlign(start, refAllele, altAlleles[i], _sequenceProvider.Sequence);
variants.Add(GetVariant(chromosome, shiftedStart, end - (start - shiftedStart), shiftedRef, shiftedAlt, infoData, variantCategory, isDecomposedVar, isRecomposed, linkedVids?[i]?.ToArray(), null));
}
return(variants.Count == 0 ? null : variants.ToArray());
}
/// <summary>
/// Extracts a dbSNP item from the specified VCF line.
/// </summary>
/// <param name="vcfLine"></param>
/// <returns></returns>
public IEnumerable <DbSnpItem> ExtractItem(string vcfLine)
{
var splitLine = vcfLine.Split('\t', 6);
if (splitLine.Length < 5)
{
yield break;
}
var chromosomeName = splitLine[VcfCommon.ChromIndex];
if (!_sequenceProvider.RefNameToChromosome.ContainsKey(chromosomeName))
{
yield break;
}
var chromosome = _sequenceProvider.RefNameToChromosome[chromosomeName];
var position = int.Parse(splitLine[VcfCommon.PosIndex]);
var dbSnpId = Convert.ToInt64(splitLine[VcfCommon.IdIndex].Substring(2));
var refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
foreach (var altAllele in altAlleles)
{
var(shiftedPos, shiftedRef, shiftedAlt) =
VariantUtils.TrimAndLeftAlign(position, refAllele, altAllele, _sequenceProvider.Sequence);
yield return(new DbSnpItem(chromosome, shiftedPos, dbSnpId, shiftedRef, shiftedAlt));
}
}
public void Left_align_multiple_padding_bases()
{
var reference = new SimpleSequence(new string('A', VariantUtils.MaxUpstreamLength) + "ATGTGTTGTTATTCTGTGTGCAT");
var rotatedVariant = VariantUtils.TrimAndLeftAlign(501, "AT", "ATT", reference);
Assert.Equal(502, rotatedVariant.start);
Assert.Equal("T", rotatedVariant.altAllele);
}
public void Left_align_insertion(int position, string altAllele, int rotatedPos, string rotatedAlt)
{
var reference = new SimpleSequence(new string('A', VariantUtils.MaxUpstreamLength) + "ATGTGTTGTTATTCTGTGTGCAT");
var rotatedVariant = VariantUtils.TrimAndLeftAlign(position, "", altAllele, reference);
Assert.Equal(rotatedPos, rotatedVariant.start);
Assert.Equal(rotatedAlt, rotatedVariant.altAllele);
}
private List <AlleleFrequencyItem> ExtractItems(string vcfLine)
{
var splitLine = vcfLine.Split(new[] { '\t' }, 9);// we don't care about the many fields after info field
if (splitLine.Length < 8)
{
return(null);
}
Clear();
var chromosomeName = splitLine[VcfCommon.ChromIndex];
if (!_refNameDictionary.ContainsKey(chromosomeName))
{
return(null);
}
var chromosome = _refNameDictionary[chromosomeName];
var position = int.Parse(splitLine[VcfCommon.PosIndex]);//we have to get it from RSPOS in info
var refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
var infoFields = splitLine[VcfCommon.InfoIndex];
// parses the info fields and extract frequencies, ancestral allele, allele counts, etc.
ParseInfoField(infoFields);
if (_allAlleleNumber == null)
{
return(null);
}
var items = new List <AlleleFrequencyItem>();
for (var i = 0; i < altAlleles.Length; i++)
{
var alleleCount = GetAlleleCount(_allAlleleCounts, i);
if (alleleCount == null || alleleCount == 0)
{
continue;
}
var frequency = 1.0 * alleleCount.Value / _allAlleleNumber.Value;
var(shiftedPos, shiftedRef, shiftedAlt) = VariantUtils.TrimAndLeftAlign(position, refAllele,
altAlleles[i], _sequenceProvider.Sequence);
items.Add(new AlleleFrequencyItem(chromosome, shiftedPos, shiftedRef, shiftedAlt, frequency));
}
return(items.Count > 0? items: null);
}
private TopMedItem ExtractItems(string vcfLine)
{
if (vcfLine == null)
{
return(null);
}
var splitLine = vcfLine.OptimizedSplit('\t');
if (splitLine.Length < 8)
{
return(null);
}
Clear();
// chr1 10169 TOPMed_freeze_5?chr1:10,169 T C 255 SVM VRT=1;NS=62784;AN=125568;AC=20;AF=0.000159276;Het=20;Hom=0 NA:FRQ 125568:0.000159276
var chromosome = splitLine[VcfCommon.ChromIndex];
if (!_refChromDict.ContainsKey(chromosome))
{
return(null);
}
var chrom = _refChromDict[chromosome];
var position = int.Parse(splitLine[VcfCommon.PosIndex]);//we have to get it from RSPOS in info
var refAllele = splitLine[VcfCommon.RefIndex];
var altAllele = splitLine[VcfCommon.AltIndex];
var filters = splitLine[VcfCommon.FilterIndex];
var infoFields = splitLine[VcfCommon.InfoIndex];
if (altAllele.Contains(","))
{
Console.WriteLine(vcfLine);
throw new InvalidDataException("het site found!!");
}
var failedFilter = !(filters.Equals("PASS") || filters.Equals("."));
ParseInfoField(infoFields);
if (_alleleNum == 0)
{
return(null);
}
var(shiftedPos, shiftedRef, shiftedAlt) = VariantUtils.TrimAndLeftAlign(position, refAllele,
altAllele, _sequenceProvider.Sequence);
return(new TopMedItem(chrom, shiftedPos, shiftedRef, shiftedAlt, _alleleNum, _alleleCount, _homCount,
failedFilter));
}
private List <ClinVarItem> GetValidItems(List <ClinVarItem> clinVarItems)
{
var shiftedItems = new List <ClinVarItem>();
foreach (var item in clinVarItems)
{
_sequenceProvider.LoadChromosome(item.Chromosome);
if (!ValidateRefAllele(item))
{
continue;
}
string refAllele = item.RefAllele, altAllele = item.AltAllele;
if (string.IsNullOrEmpty(item.RefAllele) && item.VariantType == "Deletion")
{
refAllele = GetReferenceAllele(item, _sequenceProvider.Sequence);
}
if (string.IsNullOrEmpty(item.RefAllele) && item.VariantType == "Indel" && !string.IsNullOrEmpty(item.AltAllele))
{
refAllele = GetReferenceAllele(item, _sequenceProvider.Sequence);
}
if (string.IsNullOrEmpty(item.AltAllele) && item.VariantType == "Duplication")
{
altAllele = GetAltAllele(item, _sequenceProvider.Sequence);
}
if (string.IsNullOrEmpty(refAllele) && string.IsNullOrEmpty(altAllele))
{
continue;
}
int start;
(start, refAllele, altAllele) = VariantUtils.TrimAndLeftAlign(item.Position, refAllele, altAllele, _sequenceProvider.Sequence);
shiftedItems.Add(new ClinVarItem(item.Chromosome,
start,
item.Stop,
refAllele,
altAllele,
item.JsonSchema,
item.AlleleOrigins, item.VariantType, item.Id, item.VariationId, item.ReviewStatus, item.MedGenIds, item.OmimIds, item.OrphanetIds, item.Phenotypes, item.Significances, item.PubmedIds, item.LastUpdatedDate));
}
shiftedItems.Sort();
return(shiftedItems);
}
private List <AncestralAlleleItem> ExtractItems(string vcfLine)
{
var splitLine = vcfLine.Split(new[] { '\t' }, 9);// we don't care about the many fields after info field
if (splitLine.Length < 8)
{
return(null);
}
Clear();
var chromosomeName = splitLine[VcfCommon.ChromIndex];
if (!_refNameDictionary.ContainsKey(chromosomeName))
{
return(null);
}
var chromosome = _refNameDictionary[chromosomeName];
var position = int.Parse(splitLine[VcfCommon.PosIndex]);//we have to get it from RSPOS in info
var refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
var infoFields = splitLine[VcfCommon.InfoIndex];
// parses the info fields and extract frequencies, ancestral allele, allele counts, etc.
var hasSymbolicAllele = altAlleles.Any(x => x.OptimizedStartsWith('<') && x.OptimizedEndsWith('>'));
if (hasSymbolicAllele)
{
return(null);
}
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
ParseInfoField(infoFields);
var ancestralAlleleItems = new List <AncestralAlleleItem>();
foreach (string altAllele in altAlleles)
{
var(shiftedPos, shiftedRef, shiftedAlt) = VariantUtils.TrimAndLeftAlign(position, refAllele,
altAllele, _sequenceProvider.Sequence);
ancestralAlleleItems.Add(new AncestralAlleleItem(chromosome, shiftedPos, shiftedRef, shiftedAlt, _ancestralAllele));
}
return(ancestralAlleleItems);
}
public static void UpdateChromToPositions(Dictionary <IChromosome, List <int> > chromPositions, IChromosome chromosome, int position, string refAllele, string altAllele, ISequence refSequence)
{
if (!chromPositions.ContainsKey(chromosome))
{
chromPositions.Add(chromosome, new List <int>(16 * 1024));
}
foreach (string allele in altAllele.OptimizedSplit(','))
{
if (allele.OptimizedStartsWith('<') || allele.Contains('[') || altAllele.Contains(']'))
{
continue;
}
(int shiftedPos, string _, string _) =
VariantUtils.TrimAndLeftAlign(position, refAllele, allele, refSequence);
chromPositions[chromosome].Add(shiftedPos);
}
}
public IVariant[] CreateVariants(IChromosome chromosome, int start, int end, string refAllele,
string[] altAlleles, IInfoData infoData, bool[] isDecomposedByAllele, bool isRecomposed, List <string>[] linkedVids, string globalMajorAllele)
{
bool isReference = globalMajorAllele != null;
if (isReference)
{
return(ReferenceVariantCreator.Create(_vidCreator, _sequence, chromosome, start, end, refAllele, altAlleles[0], globalMajorAllele));
}
var variantCategory = GetVariantCategory(altAlleles[0], infoData.SvType);
var variants = new List <IVariant>(altAlleles.Length);
for (var i = 0; i < altAlleles.Length; i++)
{
#if (!NI_ALLELE)
if (VcfCommon.IsNonInformativeAltAllele(altAlleles[i]))
{
continue;
}
#endif
string altAllele = altAlleles[i];
bool isDecomposed = isDecomposedByAllele[i];
if (isDecomposed && isRecomposed)
{
throw new InvalidDataException("A variant can't be both decomposed and recomposed");
}
(int shiftedStart, string shiftedRef, string shiftedAlt) =
VariantUtils.TrimAndLeftAlign(start, refAllele, altAllele, _sequence);
if (variantCategory == VariantCategory.SmallVariant || variantCategory == VariantCategory.Reference)
{
end = shiftedStart + shiftedRef.Length - 1;
}
variants.Add(GetVariant(chromosome, shiftedStart, end, shiftedRef, shiftedAlt, infoData, variantCategory,
isDecomposed, isRecomposed, linkedVids?[i]?.ToArray()));
}
return(variants.Count == 0 ? null : variants.ToArray());
}
internal List <CosmicItem> ExtractCosmicItems(string vcfLine)
{
var splitLine = vcfLine.Split(new[] { '\t' }, 8);
//skipping large variants
if (splitLine[VcfCommon.RefIndex].Length > MaxVariantLength || splitLine[VcfCommon.AltIndex].Length > MaxVariantLength)
{
return(null);
}
string chromosomeName = splitLine[VcfCommon.ChromIndex];
if (!_refChromDict.ContainsKey(chromosomeName))
{
return(null);
}
var chromosome = _refChromDict[chromosomeName];
int position = int.Parse(splitLine[VcfCommon.PosIndex]);
string cosmicId = splitLine[VcfCommon.IdIndex];
string refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
string infoField = splitLine[VcfCommon.InfoIndex];
Clear();
ParseInfoField(infoField);
var cosmicItems = new List <CosmicItem>();
foreach (string altAllele in altAlleles)
{
var(shiftedPos, shiftedRef, shiftedAlt) = VariantUtils.TrimAndLeftAlign(position, refAllele,
altAllele, _sequenceProvider.Sequence);
cosmicItems.Add(_studies.TryGetValue(cosmicId, out var studies)
? new CosmicItem(chromosome, shiftedPos, cosmicId, shiftedRef, shiftedAlt, _geneName, studies,
_sampleCount)
: new CosmicItem(chromosome, shiftedPos, cosmicId, shiftedRef, shiftedAlt, _geneName, null,
_sampleCount));
}
return(cosmicItems);
}
private string GetNextChromDestinations(string line)
{
//extracting current chrom info from first line provided
var currentChromName = line.Split('\t', 2)[VcfCommon.ChromIndex];
Console.Write($"Getting destinations for chromosome:{currentChromName}...");
var currentChrom = ReferenceNameUtilities.GetChromosome(_desSequenceProvider.RefNameToChromosome, currentChromName);
_desSequenceProvider.LoadChromosome(currentChrom);
do
{
var splits = line.Split('\t', VcfCommon.InfoIndex);
var chrom = splits[VcfCommon.ChromIndex];
if (chrom != currentChromName)
{
break;
}
var refAllele = splits[VcfCommon.RefIndex];
var altAlleles = splits[VcfCommon.AltIndex].Split(',');
var position = int.Parse(splits[VcfCommon.PosIndex]);
var rsIds = Utilities.GetRsids(splits[VcfCommon.IdIndex]);
if (rsIds == null)
{
continue;
}
var processedVariants = altAlleles.Select(x => VariantUtils.TrimAndLeftAlign(position, refAllele, x, _desSequenceProvider.Sequence)).ToArray();
foreach (var(start, variantRef, variantAlt) in processedVariants)
{
foreach (var rsId in rsIds)
{
if (!_destinationVariants.TryGetValue((rsId, variantRef.Length, variantAlt), out var variants))
{
variants = new List <int>();
_destinationVariants[(rsId, variantRef.Length, variantAlt)] = variants;
public int Map()
{
// write out the relocated locations of the leftover rsIds whenever possible
//reading in the leftover ids
var leftoverIds = new HashSet <(long, string)>();
Console.Write("Loading leftover ids...");
string line;
while ((line = _leftoverReader.ReadLine()) != null)
{
var splits = line.Split('#', 3);
var id = long.Parse(splits[0]);
var alt = splits[1];
leftoverIds.Add((id, alt));
}
Console.WriteLine($"{leftoverIds.Count} found.");
// stream through the dest file to find locations
var leftoversWithDest = new Dictionary <(long, string), List <GenomicLocation> >();
var currentChromName = "";
while ((line = _destReader.ReadLine()) != null)
{
if (line.OptimizedStartsWith('#'))
{
continue;
}
var splits = line.Split('\t', VcfCommon.InfoIndex);
var chromName = splits[VcfCommon.ChromIndex];
if (chromName != currentChromName)
{
currentChromName = chromName;
Console.WriteLine($"Getting destinations for chromosome:{currentChromName}...");
var currentChrom = ReferenceNameUtilities.GetChromosome(_desSequenceProvider.RefNameToChromosome,
currentChromName);
_desSequenceProvider.LoadChromosome(currentChrom);
}
var refAllele = splits[VcfCommon.RefIndex];
var altAlleles = splits[VcfCommon.AltIndex].Split(',');
var position = int.Parse(splits[VcfCommon.PosIndex]);
var rsIds = Utilities.GetRsids(splits[VcfCommon.IdIndex]);
if (rsIds == null)
{
continue;
}
var processedVariants = altAlleles.Select(x => VariantUtils.TrimAndLeftAlign(position, refAllele, x, _desSequenceProvider.Sequence)).ToArray();
foreach (var(_, _, variantAlt) in processedVariants)
{
foreach (var rsId in rsIds)
{
if (!leftoverIds.Contains((rsId, variantAlt)))
{
continue;
}
var pos = int.Parse(splits[VcfCommon.PosIndex]);
if (!leftoversWithDest.TryGetValue((rsId, variantAlt), out var locations))
{
locations = new List <GenomicLocation>();
leftoversWithDest[(rsId, variantAlt)] = locations;
private string ProcessNextChromSource(string line)
{
//extracting current chrom info from first line provided
var currentChromName = line.Split('\t', 2)[VcfCommon.ChromIndex];
var currentChrom = ReferenceNameUtilities.GetChromosome(_srcSequenceProvider.RefNameToChromosome, currentChromName);
_srcSequenceProvider.LoadChromosome(currentChrom);
var leftoverCount = 0;
do
{
var splits = line.Split('\t', VcfCommon.InfoIndex);
var chrom = splits[VcfCommon.ChromIndex];
if (chrom != currentChromName)
{
break;
}
var refAllele = splits[VcfCommon.RefIndex];
var altAlleles = splits[VcfCommon.AltIndex].Split(',');
var position = int.Parse(splits[VcfCommon.PosIndex]);
var rsIds = Utilities.GetRsids(splits[VcfCommon.IdIndex]);
if (rsIds == null)
{
continue;
}
var processedVariants = altAlleles.Select(x => VariantUtils.TrimAndLeftAlign(position, refAllele, x, _srcSequenceProvider.Sequence)).ToArray();
var foundInDest = false;
foreach (var(_, variantRef, variantAlt) in processedVariants)
{
foreach (var rsId in rsIds)
{
if (!_destinationVariants.TryGetValue((rsId, variantRef.Length, variantAlt), out var targetPositions))
{
continue;
}
targetPositions.ForEach(x => WriteRemappedEntry(chrom, x, variantRef, variantAlt, line));
//flipping the sign to indicate it has been mapped
//_destinationVariants[rsId] = (-variant.position, variant.refAllele, variant.altAlleles);
foundInDest = true;
}
}
if (foundInDest)
{
continue;
}
foreach (var(_, _, variantAlt) in processedVariants)
{
foreach (var rsId in rsIds)
{
_leftoverWriter.WriteLine(string.Join('#', rsId.ToString(), variantAlt, line));
}
}
leftoverCount++;
} while ((line = _srcReader.ReadLine()) != null);
Console.WriteLine($"Leftover count for {currentChromName}: {leftoverCount}");
//Console.WriteLine($"Number of entries discarded due to allele mismatch: {_alleleMismatchCount}");
_leftoverCount += leftoverCount;
return(line);
}
/// <summary>
/// Extracts a gnomad item(s) from the specified VCF line.
/// </summary>
/// <param name="vcfline"></param>
/// <returns></returns>
private List <GnomadItem> ExtractItems(string vcfline)
{
if (vcfline == null)
{
return(null);
}
var splitLine = vcfline.OptimizedSplit('\t');
if (splitLine.Length < 8)
{
return(null);
}
Clear();
var chromosome = splitLine[VcfCommon.ChromIndex];
if (!_sequenceProvider.RefNameToChromosome.ContainsKey(chromosome))
{
return(null);
}
var chrom = _sequenceProvider.RefNameToChromosome[chromosome];
var position = int.Parse(splitLine[VcfCommon.PosIndex]); //we have to get it from RSPOS in info
var refAllele = splitLine[VcfCommon.RefIndex];
var altAlleles = splitLine[VcfCommon.AltIndex].OptimizedSplit(',');
var filters = splitLine[VcfCommon.FilterIndex];
var infoFields = splitLine[VcfCommon.InfoIndex];
var hasFailedFilters = !(filters.Equals("PASS") || filters.Equals("."));
// parses the info fields and extract frequencies, coverage, num samples.
try
{
ParseInfoField(infoFields);
}
catch (Exception e)
{
Console.WriteLine(vcfline);
Console.WriteLine(e);
throw;
}
if (_anAll == 0)
{
return(null);
}
var gnomadItemsList = new List <GnomadItem>();
for (int i = 0; i < altAlleles.Length; i++)
{
var(alignedPos, alignedRef, alignedAlt) =
VariantUtils.TrimAndLeftAlign(position, refAllele, altAlleles[i], _sequenceProvider.Sequence);
gnomadItemsList.Add(new GnomadItem(
chrom,
alignedPos,
alignedRef,
alignedAlt,
_totalDepth,
_anAll, _anAfr, _anAmr, _anEas, _anFin, _anNfe, _anOth, _anAsj, _anSas,
GetCount(_acAll, i), GetCount(_acAfr, i), GetCount(_acAmr, i), GetCount(_acEas, i),
GetCount(_acFin, i), GetCount(_acNfe, i), GetCount(_acOth, i), GetCount(_acAsj, i),
GetCount(_acSas, i),
GetCount(_hcAll, i), GetCount(_hcAfr, i), GetCount(_hcAmr, i), GetCount(_hcEas, i), GetCount(_hcFin, i),
GetCount(_hcNfe, i), GetCount(_hcOth, i), GetCount(_hcAsj, i), GetCount(_hcSas, i),
hasFailedFilters)
);
}
return(gnomadItemsList);
}
