A research group collaborating with the hospital extracted DNA from the peripheral blood leucocytes of the patient V.1, her sister V.2, her mother IV.1 and her father IV.2 with consent and ethical approval for experimental work involving human tissues. These specimens were used for sequencing studies to screen for causative variants in amyloid precursor protein (APP), presenilin-1 (PSEN1) and presenlin-2 (PSEN-2) genes. The outcome is shown in Fig. 2 below. APP 1020 IV.1 961 TACGGCGGATGTGGCGGCAACCGGAACAACTTTGACACAGAAGAGTACTGCATGGCCGTG V.2 961 TACGGCGGATGTGGCGGCAACCGGAACAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 Amino Acid -Y--G--G--C--G--G--N--R--N--N--F--D--T--E--E--Y--C--M--A--V-340 IV.2 961 TACGGCGGATGTGGCGGCAACCGGAATAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 V.1 961 TACGGCGGATGTGGCGGCAACCGGAATAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 Amino Acid PSEN-1 -YGGCGGNRNNFDTEEY CMA-V-340 IV.1 361 V.2 361 Amino Acid DTETVGQRAT HSTINAAT MT CATACCCACACTCTCCCCCACACACCCCTCCACTCAATTCTCAATCCTCCCATCATCATC 420 420 140 GATACCGAGACTATE SOCAGAGAGCCCTGCACTCAATTCTGAATGCTGCCATCATGATC TV.2 361 GATACCGAGACTGTGGGCCAGAGAGCCCTGCACTCAATTCTGAATGCTGCCATCATGATC 120 v.1 361 CACACCGACACTCTCCCCCACACACCCCTGCACTCAATTCTCATCCTCCCATCATCATC 420 Amino Acid -DTETVGQRAHSILNA AIM-T- 140 PSEN-2 IV.1 421 AACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 V.2 421 AACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 Amino Acid -N--T--L--I--M--I--S--V--I--V--V--M--T--I--F--L--V--V--L--Y- 160 Select one: True O False 480 IV.2 421 TACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC V.1 421 TACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 Amino Acid -Y--T--L--I--M--I--S--V--I--V--V--M--T--I--F--L--V--V--L--Y- 160 Fig.2 Gene sequencing analysis results for Amyloid Precursor Protein (APP), Presenilin-1 (PSEN-1) and Presenilin-2 (PSEN-2) from individuals IV.1, V.2, IV.2 and V.1. The DNA sequence for each individual is given with the corresponding amino acid sequence noted beneath. A point mutation was identified in the DNA coding sequence of each of these regions for the 3 genes and is highlighted in red. Using the information in Figure 2 and your background knowledge, answer questions 7 to 8. Question 7) The most likely cause of early onset Alzheimer's disease in patient V.1 is a silent mutation
A research group collaborating with the hospital extracted DNA from the peripheral blood leucocytes of the patient V.1, her sister V.2, her mother IV.1 and her father IV.2 with consent and ethical approval for experimental work involving human tissues. These specimens were used for sequencing studies to screen for causative variants in amyloid precursor protein (APP), presenilin-1 (PSEN1) and presenlin-2 (PSEN-2) genes. The outcome is shown in Fig. 2 below. APP 1020 IV.1 961 TACGGCGGATGTGGCGGCAACCGGAACAACTTTGACACAGAAGAGTACTGCATGGCCGTG V.2 961 TACGGCGGATGTGGCGGCAACCGGAACAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 Amino Acid -Y--G--G--C--G--G--N--R--N--N--F--D--T--E--E--Y--C--M--A--V-340 IV.2 961 TACGGCGGATGTGGCGGCAACCGGAATAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 V.1 961 TACGGCGGATGTGGCGGCAACCGGAATAACTTTGACACAGAAGAGTACTGCATGGCCGTG 1020 Amino Acid PSEN-1 -YGGCGGNRNNFDTEEY CMA-V-340 IV.1 361 V.2 361 Amino Acid DTETVGQRAT HSTINAAT MT CATACCCACACTCTCCCCCACACACCCCTCCACTCAATTCTCAATCCTCCCATCATCATC 420 420 140 GATACCGAGACTATE SOCAGAGAGCCCTGCACTCAATTCTGAATGCTGCCATCATGATC TV.2 361 GATACCGAGACTGTGGGCCAGAGAGCCCTGCACTCAATTCTGAATGCTGCCATCATGATC 120 v.1 361 CACACCGACACTCTCCCCCACACACCCCTGCACTCAATTCTCATCCTCCCATCATCATC 420 Amino Acid -DTETVGQRAHSILNA AIM-T- 140 PSEN-2 IV.1 421 AACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 V.2 421 AACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 Amino Acid -N--T--L--I--M--I--S--V--I--V--V--M--T--I--F--L--V--V--L--Y- 160 Select one: True O False 480 IV.2 421 TACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC V.1 421 TACACCCTCATCATGATCAGCGTCATCGTGGTTATGACCATCTTCTTGGTGGTGCTCTAC 480 Amino Acid -Y--T--L--I--M--I--S--V--I--V--V--M--T--I--F--L--V--V--L--Y- 160 Fig.2 Gene sequencing analysis results for Amyloid Precursor Protein (APP), Presenilin-1 (PSEN-1) and Presenilin-2 (PSEN-2) from individuals IV.1, V.2, IV.2 and V.1. The DNA sequence for each individual is given with the corresponding amino acid sequence noted beneath. A point mutation was identified in the DNA coding sequence of each of these regions for the 3 genes and is highlighted in red. Using the information in Figure 2 and your background knowledge, answer questions 7 to 8. Question 7) The most likely cause of early onset Alzheimer's disease in patient V.1 is a silent mutation
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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