Mammalian prolactin signal peptide alignment

A comparison of signal peptide sequences with the sequence derived for the 'ancestral placental mammal' is shown below the first alignment (* indicates gap).
                        10        20         30
Human           MNIKGSPWKGSLLLLL***V SNLLLCQSVAP
Chimpanzee      MNIKGSPWKGSLLLLL***V SNLLLCHSVAP
Rhesus monkey   MNIKGSPWKGSLLLLL***V SNLLLCQNVAP
Marmoset                  SLLLLL***V SNLLLWQSVTP
SlowLoris                 SLLLLLLILL SNLLLCKSVAS
Ox              MDSKGSSQKGSRLLLLLV*V SNLLLCQGVVS
Sheep           MDSKGSAQKGSRLLLLLV*V SNLLLCQGVVS
Goat            MDSKGSAQKGSRLLLLLV*V SNLLLCQGVVS
Pig             MDNTGSSQKGSLLLLLLL*V GNLFLCKSVAS
Cat             MDNKGWSLKGSLLFLLLLLL SDLLLCKSVAS
Rabbit          MDSKWSRRTGSLLLLL***V SNLLLCKSTAS
Rat             MNSQVSARKAGTLLLLM**M SNLLFCQNVQT
Mouse           MNSQGSAQKAGTLLLLL**I SNLLFCQNVQP
Hamster         MNSQGSDRKAVTLLLLV**M SNLLFCQNAHP

Ancestral p.m.  MDSKGSSRKGSLLLLLL**V SNLLLCKSVAS

Possum          MGTKRSSLKGSLLLLLL**M SSLFLFKSVES
Monodelphis     MCPKGSSVKGSLLLLLL**M SSRFLFKAVES

A sequence was predicted for the prolactin signal peptide of the ancestral placental mammal (Anc.p.m.) by making the simplifying assumption that all eutherian mammalian orders diverged at the same point in evolutionary time. The following alignment shows differences between extant sequences and this ancestral one (- indicates identity, * indicates gap):

                                                  Diff from a.p.m.

Human           -NI---PW--------***- ------Q---P     6 & indel
Chimpanzee      -NI---PW--------***- ------H---P     6 & indel
Rhesus monkey   -NI---PW--------***- ------QN--P     7 & indel
Marmoset                  ------***- -----WQ--TP
SlowLoris                 -------ILL -----------
Ox              -------Q---R-----V*- ------QG-V-     5 & indel
Sheep           ------AQ---R-----V*- ------QG-V-     6 & indel
Goat            ------AQ---R-----V*- ------QG-V-     6 & indel
Pig             --NT---Q---------L*- G--F-------     5 & indel
Cat             --N--W-L-----F---LLL -D---------     6 & indel
Rabbit          ----W-R-T-------***- --------T--     4 & indel
Rat             -N-QV-A--AGT----M**M ----F-QN-QT    14
Mouse           -N-Q--AQ-AGT-----**I ----F-QN-QP    13
Hamster         -N-Q--D--AVT----V**M ----F-QNAHP    15

Ancestral.p.m.  MDSKGSSRKGSLLLLLL**V SNLLLCKSVAS

Possum          -GT-R--L---------**M -S-F-F---E-
Monodelphis     -CP----V---------**M -SRF-F-A-E-

Back to list of Prolactin Alignments

Home


Last update 5 August 2004