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Cancer Biology BIO346 Ch. 9
Chapter 9
25
Biology
Undergraduate 3
05/16/2012

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Term
tumor suppressor gene
Definition
absence or inactivation contributes to uncontrolled cell proliferation and cancer
Term
viral oncogene
Definition
presented to a cell by a virus.
Term
gene cloning
Definition
procedure that allows DNA molecules to be broken into gene-sized fragments that can be reproduced in large amounts and identified.
Term
RAS oncogene
Definition
human version of v-ras oncogene. altered form of normal cellular proto-oncogene.
Term
point mutation
Definition
single nucleotide base mutation. oftentimes creates an oncogene.
Term
homogeneously staining region (HSR)
Definition
chromosome regions that stain homogeneously rather than having alternate pattern of light and dark bands.
Term
MYC gene
Definition
common oncogene that arises from amplification in human cancers.
Term
chromosomal translocation
Definition
a piece of one chromosome is broken off and moved to another chromosome.
Term
fusion gene
Definition
gene containing sequences derived from two different genes spliced together.
Term
fusion protein
Definition
contains amino acid sequences encoded by both the BCR and ABL genes.
Term
deletion
Definition
short stretch of DNA is lost during replication
Term
transposition
Definition
rearrangement in which DNA segments are moved from one location to another.
Term
TRK oncogene
Definition
inversion of TPM3 and NTRK1 gene.
Term
Ras-MAPK pathway
Definition
stimulates normal cell proliferation (and sometimes abnormally in cancer cells)
Term
platelet-derived growth factor (PDGF)
Definition
protein produced by blood platelets that stimulates the proliferation of connective tissue cells.
Term
receptor
Definition
transmembrane proteins that transmi signals when bound to growth factors into the inside of the cell.
Term
receptor tyrosine kinase
Definition
in Ras-MAPK pathway that phosphorylates the amino acid tyrosine in target proteins.
Term
constitutively active
Definition
exhibits activity even in absence of Growth factor (tyrosine kinase and EGF).
Term
STATs
Definition
trigger changes in gene expression that can stimulate proliferation. cytoplasmic proteins-signal transducers and activators of transcription. join together when phosphorylated and mover from the cytoplasm to the nucleus to trigger changes in gene expression.
Term
G protein
Definition
activity of protein regulated by GTP (active) and GDP (inactive). Ras proteins.
Term
Raf kinase
Definition
phosphorylated=active. then it catalyzes phosphorylation of another intracellular protein kinase called MEK. it is just a part in a cascade of phosphorylation reactions
Term
serine/threonine kinase
Definition
phosphorylates the amino acids serine/threonine in targe proteins. coded for by BRAF oncogene.
Term
nonreceptor tyrosine kinase
Definition
intracellular tyrosine kinases that do not possess receptor sites.
Term
Jak kinase
Definition
tyrosine kinase that catalyzes the phosphorylation of cytoplasmic proteins called STATs.
Term
transcription factor
Definition
proteins that bind to DNA and alter expression of specific genes.
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