Haplogroup K1a1b1a (mtDNA)

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Haplogroup K1a1b1a
Possible time of origin4,800 ± 3,600 Years Ago
Possible place of originEurope
AncestorK1a1b1
Defining mutations(114) 10978 12954 16234[1]

In human mitochondrial genetics, Haplogroup K1a1b1a is a human mitochondrial DNA (mtDNA) haplogroup.

The K1a1b1a mitochondrial DNA haplogroup subclade is found in Ashkenazi Jews and other populations. It is a subclade under haplogroup U'K.

Origin[edit]

According to National Geographic's Genographic Project, K1a1b1a has an unknown origin. The site states, "Though the origin of this lineage is not clear, it is a founding population among some Jewish Diaspora groups. Among Ashkenazi Jews, it is about 19 percent of maternal lineages. Estimates of the age of K1a1b1a vary depending on the mutation rates used. The age of K1a1b1a has been estimated at 4,800 ± 3,600 Years Ago, according to the Genographic Project.

The K1a1b1a subclade is under the U'K haplogroup and descends from K1a1b1, which is thought to be an 11,500-year-old European subclade of mostly non Jewish origins. Haplogroup K falls under the old U8 grouping. Some of the Basque people of Spain and France fall under the U8a subclade within U8. K1a1b1a is a U8b subclade within U8, with several downstream variations.

Ötzi, a mummy who was found September 1991 in the Ötztal Alps, is subclade K1ö for Ötzi. Ötzi has mtDNA marker 10978 in common with the Ashkenazi population and others who fall under the K1a1b1a subclade.

A new study and recent updates to the mtDNA tree uses three markers to define K1a1b1a, (114), 10978 and 16234. The marker 12954 along with the previous three markers mentioned, are used to define a new mtDNA subclade called K1a1b1a1.[2] This new group consists of people who are either Ashkenazi or of non Ashkenazi European ancestry.

Distribution[edit]

10% of Europeans fall under the K haplogroup. It is hypothesized that the subclade represents one of four major founding maternal lineages ("founding mothers") of Ashkenazi Jews which together account for 45% of all Ashkenazi mtDNA haplotypes. Approximately 19% of Ashkenazi Jews with ancestry from Poland are in mtDNA haplogroup K1a1b1a.[3] However, K1a1b1a has also been found in individuals of no known Jewish ancestry, and the explanation will require further research. The Genographic Project along with other research groups are looking into this phenomenon. The haplogroup is distributed in Europe and the Middle East.[4] Estimates suggest approximately 1,600,000 Jews worldwide would be K1a1b1a.

The field of genetic genealogy and DNA sequencing has permitted ordinary people to make use of DNA testing to establish some evidence for their ancestral origins. Thousands of Family Tree DNA customers have submitted their mtDNA sequences for use in scientific studies,[5] including those led by Behar and Brook. Accordingly, based on the research of Behar,[3] some connection has been established between the K1a1b1a subclade and Jewish ancestry. Aside from Ashkenazi Jews, K1a1b1a is also found in multiple communities of Sephardic Jews from Turkey and southeastern Europe[6] along with Baghdadi Jews from India[6] and Paradesi Jews from India.[7] It is also present among the Xueta people of Spain.[8] The notion of Romani origins for K1a1b1a is impossible, given the much greater genetic diversity of K1a1b1a in Jews and the fact that this haplogroup was already widespread in Jewish populations by the 14th century. The presence of K1a1b1a in Romani people in Poland[9] is the result of introgression into a Romani population.

Version 3 of van Oven's Phylotree[1] defines K1a1b1a by the highly polymorphic 114 in the second hypervariable region, 10978 and 12954 in the coding region, and 16234 in the first hypervariable region. This is supported by a growing number of GenBank samples. However, 12954 is not needed to define K1a1b1a as of 2013 and as mentioned above, is used to define K1a1b1a1.[2]

GenBank Submissions
GenBank ID Origin Ethnicity Author(s)
DQ301789 U/N Ashkenazi[10] Behar, D. et al.
DQ301795 U/N Ashkenazi[10] Behar, D. et al.
DQ301802 U/N Ashkenazi[10] Behar, D. et al.
DQ301803 U/N Ashkenazi[10] Behar, D. et al.
DQ301805 U/N Ashkenazi[10] Behar, D. et al.
DQ301813 U/N Ashkenazi[10] Behar, D. et al.
EU052292 U/N U/N Greenspan,B. (FTDNA)
EU170362 U/N U/N Greenspan,B. (FTDNA)
EU259709 U/N U/N Greenspan,B. (FTDNA)
EU327782 Zhitomir, Ukraine Ukrainian Greenspan,B. (FTDNA)
EU523126 U/N U/N Greenspan,B. (FTDNA)
EU862197 USA European Greenspan,B. (FTDNA)
EU926147 USA Jewish Greenspan,B. (FTDNA)
FJ228404 Fălticeni, Romania Ashkenazi Greenspan,B. (FTDNA)
FJ938288 Brest, Belarus Ashkenazi Greenspan,B. (FTDNA)
GU320192 USA Romanian Greenspan,B. (FTDNA)
GU571200 Frankfurt am Main, Germany Ashkenazi Greenspan,B. (FTDNA)
GU585492 U/N U/N Greenspan,B. (FTDNA)
GU722599 Bonn, Germany Ashkenazi Greenspan,B. (FTDNA)
GU723693 USA Ashkenazi Greenspan,B. (FTDNA)
HM101136 USA U/N Greenspan,B. (FTDNA)
HQ667591 Budapest, Hungary Ashkenazi Greenspan,B. (FTDNA)
HQ901176 USA Jewish Greenspan,B. (FTDNA)
JN990448 USA Ashkenazi Greenspan,B. (FTDNA)
JQ702155 Hungary[10] U/N Behar, D. et al.
JQ702245 U/N U/N Behar, D. et al.
JQ702671 Ukraine Ashkenazi[10] Behar, D. et al.
JQ702676 Uzbekistan Ashkenazi[10] Behar, D. et al.
JQ702755 Poland[10] U/N Behar, D. et al.
JQ702780 Belarus Ashkenazi[10] Behar, D. et al.
JQ702859 Lithuania[10] U/N Behar, D. et al.
JQ702945 Russia Ashkenazi[10] Behar, D. et al.
JQ703012 Russia Ashkenazi[10] Behar, D. et al.
JQ703069 U/N Ashkenazi[10] Behar, D. et al.
JQ703165 U/N U/N Behar, D. et al.
JQ703308 U/N U/N Behar, D. et al.
JQ703485 U/N U/N Behar, D. et al.
JQ703662 Ukraine[10] U/N Behar, D. et al.
JQ703855 Germany[10] U/N Behar, D. et al.
JQ704216 U/N U/N Behar, D. et al.
JQ704654 Germany[10] U/N Behar, D. et al.
JQ704812 U/N U/N Behar, D. et al.
JQ705016 Poland Ashkenazi[10] Behar, D. et al.
JQ705204 Germany[10] U/N Behar, D. et al.
JQ705568 Ukraine Ashkenazi[10] Behar, D. et al.
JQ705628 Ukraine Ashkenazi[10] Behar, D. et al.
JQ705745 Lithuania Ashkenazi[10] Behar, D. et al.
JQ705951 U/N Ashkenazi[10] Behar, D. et al.
JQ705979 U/N U/N Behar, D. et al.
JQ706006 U/N U/N Behar, D. et al.
JX153534 Denmark U/N Raule,N. et al.[11]
KC878724 Campania, Italy[10] U/N Costa, M. et al.
KC914580 USA Ashkenazi Greenspan,B. (FTDNA)
KM047228 Poland U/N Skonieczna,K. et al.[12]
KR491936 USA Ashkenazi Greenspan,B. (FTDNA)
KT946594 Great Britain, UK U/N Lee,W.T.Y. et al.[13]
KX350098 Spain U/N Iglesias,E.
KY782247 Poland U/N Malyarchuk,B. et al.[14]
MH120573 Poland U/N Piotrowska-Nowak,A. et al.[15]
MH120671 Poland U/N Piotrowska-Nowak,A. et al.[15]
MN176259 Poland U/N Piotrowska-Nowak,A.
MZ386799 USA U/N Taylor,C.R. et al.[16]
MZ387869 USA U/N Taylor,C.R. et al.[16]
PP153372 Mumbai, India Baghdadi Jewish Brook,K.A. et al.[6]

It may be recognized in hypervariable-only samples by the following essential mutations:

  • Hypervariable region 1: 16224C, 16234T, 16311C, 16519C
  • Hypervariable region 2: 073G, 263G, 315.1C, 497T

Pre-Modern K1a1b1a Samples[edit]

Medieval Jews
ID Origin Ethnicity Period Author(s)
I13861 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I13862 Erfurt, Germany West Knaanic Jewish (Erfurt-EU) 14th century Waldman,S. et al.[17]
I13866 Erfurt, Germany West Knaanic Jewish (Erfurt-EU) 14th century Waldman,S. et al.[17]
I13867 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I13870 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I14736 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I14741 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I14846 Erfurt, Germany Jewish 14th century Waldman,S. et al.[17]
I14851 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]
I14899 Erfurt, Germany Jewish 14th century Waldman,S. et al.[17]
I14903 Erfurt, Germany Ashkenazi Jewish (Erfurt-ME) 14th century Waldman,S. et al.[17]

Notable individuals with Haplogroup K1a1b1a[edit]

Subclades[edit]

Tree[edit]

This phylogenetic tree of haplogroup K subclades is based on the paper by Mannis van Oven and Manfred Kayser Updated comprehensive phylogenetic tree of global human mitochondrial DNA variation[1] and subsequent published research. Newer research has further updated the phylogenetic tree of haplogroup K subclades.[2] However, the K1a1b1a1 subclade has yet to be approved and does not appear in the Build 17 PhyloTree as of February 18, 2016.

  • K1a1b1 11470G
    • K1a1b1a 10978G 12954C 16234T
    • K1a1b1b 593C 2483C
      • K1a1b1b1 789C 11620G
    • K1a1b1c 5585A 16222T
    • K1a1b1d 14388G 16092C 16223T
    • K1a1b1e 9932A
    • K1a1b1f 4823C 6528T 8842C
    • K1a1b1g 5583T 12007A

See also[edit]

Phylogenetic tree of human mitochondrial DNA (mtDNA) haplogroups

  Mitochondrial Eve (L)    
L0 L1–6  
L1 L2   L3     L4 L5 L6
M N  
CZ D E G Q   O A S R   I W X Y
C Z B F R0   pre-JT   P   U
HV JT K
H V J T

References[edit]

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External links[edit]