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SGD Help: Chromosome History
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Contents
The Chromosome History displays the sequence and annotation history
of a particular chromosome in SGD. This includes information about new
genes or features, updates to the sequence and/or annotation, and
other related notes.
Please note: As of June 19, 2006, the Chromosome History replaces the
"Table of Sequence Updates," the "Table of Sequence Annotation
Changes," and all associated pages.
At the top of the
page are listed the numbers of sequence and annotation changes that
have been made to the chromosome's systematic reference sequence since
its intial release on 1996-07-31, as well as the number of chromosomal
features that have been affected by these changes. Note that some
changes may have affected more than one overlapping or adjacent
feature, or some features may have been updated more than once, so
that the number of changes may differ from the number of affected
features. Also included is a link to the directory on SGD's FTP
site that contains current and archived versions of the
chromosome's sequence and annotation records.
The Chromosome History contains the following two sections:
SEQUENCE CHANGES, including any resulting annotation changes
This section displays SGD curator notes describing sequence changes
that have been made to the chromosome's systematic reference sequence,
as well as any annotation changes that resulted from those sequence
changes.
Included above each note is a data row(s) containing
information in the following columns:
- Date - the date the change was made
- Affected Features - names of the features affected by the change,
hyperlinked to their respective Locus Summaries
- Start Coordinate of Change - the coordinate of the first
nucleotide involved in the sequence change
- End Coordinate of Change - the coordinate of the last nucleotide
involved in the sequence change
- Type of Change - the type of sequence change (deletion, insertion,
or substitution)
- Old Sequence - the previous version of the
sequence (pre-change)
- New Sequence - the updated version of the sequence (post-change)
The default sorting of the Sequence Change table is by Date with the
most recent change at the top of the list. The column headings for
Affected Features, Start Coordinate of Change, and Type of Change are
clickable for ascending or descending sorting on those columns. The
first click on each of these column headers will produce ascending
sorting on that column,
the second click will produce descending sorting, and subsequent clicks
will alternate between the two.
ANNOTATION CHANGES without sequence changes
This section displays SGD curator notes describing annotation changes
that have been made to the chromosome, that specifically did NOT
result from sequence changes. These types of changes can include the
addition of a new feature, deletion of a feature, merge of one feature
into another, a change in the annotated position of a start or stop
codon, etc.
Included above each note is a data row(s)
containing information in the following columns:
- Date - the date the change was made
- Affected Features - names of the features affected by the change,
hyperlinked to their respective Locus Summaries
The default sorting of the Annotation Change table is by Date with the
most recent change at the top of the list. The column heading for
Affected Features is
clickable for ascending or descending sorting on that column. The
first click on this column header will produce ascending
sorting,
the second click will produce descending sorting, and subsequent clicks
will alternate between the two.
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