You may have heard that a few days ago the full mtDNA sequence for the 5300 year old
Otzi the Iceman from the Austrian Alps was published on GenBank. The accession
number for him is EU810403. It was previously known that he was in subclade K1, but
not in one of its three lower subclades. He had one fairly common extra HVR1
mutation, 16362C, plus two rare extra coding-region mutations, 3513T and 8137T. He
also had the very common 309.1C insertion and three pairs of position 524
insertions. He, of course, had the two defining mutations for K1, 1189C and 10398G,
plus the 6 HVR and 20 coding-region mutations shared by virtually every K. I have
created a MitoSearch entry for Otzi: 4Q6JA.
The authors, Ermini et al., compared the Otzi sequence to 115 other K sequences on
GenBank. Thirty of those are direct submissions by FTDNA customers, including 29
from our K Project members. Since there are now 62 GenBank K submissions, the 30
count reflects the cutoff date for the research of several months ago. The sequence
receiving the most discussion is from one of our members in K1. If you look at the
chart under “mtDNA results” on our website, you will see we now have two members
confirmed in the K1 subclade. Otzi and our two in K1 share the 16362C mutation, but
a recurrent HVR mutation is almost never used as a defining mutation for a subclade.
Much has been made about Otzi being in K1, having only the two rare coding-region
mutations, and not having any known living matches. One theory is that he was a
member of a now-extinct fourth subclade of K1; K1d, I assume, although the
scientists have used K1? (? for Otzi). Normal practice is to not create a subclade
for a singleton sequence; otherwise maybe hundreds of us would have our own private
subclade designations. Many of us with FGS results have two or more private
coding-region mutations. And many of us have no matches.
Another theory is that Otzi was a K1a whose line had a back mutation on the defining
mutation for K1a, 497T. With his mutation list, he could only be a K1a in no lower
subclade. We have five such K1a-only members in the Project; there are only two
others on GenBank. Two of those have the three pairs of 524 insertions, as does
Otzi. But I’ve seen about a thousand sets of high-resolution results and I’ve
never seen one who looked like a K1a missing 497T. That mutation may be unique to
K1a, and it appears to be extremely stable. So I’m not prepared to accept that
theory. If Otzi’s sequence had showed up in one of our members, I would not
thought it anymore unusual than the two K1’s we have.
The paper with the Otzi sequence is in Cell Biology at
http://www.cell.com/current-biology/abstract/S0960-9822(08)01254-2 That’s a
subscription publication, but the Supplemental Data, listed on the right side, may
be downloaded for free. The last page lists the 30 FTDNA K GenBank sequences. You
might read the Science News article at
http://www.sciencenews.org/view/generic/id/38191/title/A_mysterious_genetic_past_for_the_Iceman Several other articles may be found by using Google News. One article mentions a
different Otzi paper:
http://www.theaustralian.news.com.au/story/0,25197,24579319-30417,00.html I
haven’t seen anything else on that paper.
In other news, a new comprehensive mtDNA tree is available at
http://www.phylotree.org/ Some FTDNA GenBank submissions were used, but not for K
so far. The K portion is mainly the current Behar tree with a few new subclade
labels added. Don’t get attached to those new labels, as they might change when a
major revision of the K tree is published based on new GenBank sequences and the
FTDNA FGS results for which Agreements have been returned. (Yes, that’s another
hint that if you haven’t replied to your FGS results notification with Agree,
please do so.)
K Project member Jim Honeychuck has created two Google maps for the K1a10 subclade.
See
http://maps.google.co.uk/maps/ms?ie=UTF8&hl=en&msa=0&msid=101077415341135244622.000452702192ba5efd94e&ll=56.704506,5.976563&spn=27.028481,57.392578&z=4 and
http://maps.google.com/maps/ms?hl=en&ie=UTF8&msa=0&msid=101077415341135244622.00045846fece1231b7078&ll=48.69096,3.515625&spn=55.952597,157.5&z=3Bill Hurst
Administrator, mtDNA Haplogroup K Project