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Archive-name: auto/bionet.molbio.genbank/Prerelease-of-PDB-entries


                        Protein Data Bank Announcement on
                          Pre-release of Pending Entries

The PDB is instituting new procedures designed to expedite the release of all
status P atomic coordinate entries. A category of entries called pre-release
entries will be available immediately on the PDB e-mail server and anonymous
FTP  as well as from affiliated distribution centers belonging to the Protein
Data Bank Service Association (PDBSA).

The objective of pre-release is to make pending entries readily available to
the scientific community. These entries contain atomic coordinate data and a
limited number of PDB record types useful in identifying the deposition. All
other details will be provided when the standard release entry becomes
available.

Pre-release entries may not fully conform to the specifications given in the
Protein Data Bank Atomic Coordinate and Bibliographic Entry Format Description.
For example, residue and atom names for heterogens may not be in the PDB
standard format. Changes to these names may therefore occur when the standard
release entry becomes available.

The following checks have been made for all pre-release entries:

	1.Amino acid sequence for proteins compared to the non-redundant
	sequence database using the GENINFO computing environment 
	(National Center for Biotechnology Information, 
	National Library of Medicine).

	2.Stereochemistry including:

		Bond distances and angles
		Distortions of planar groups
		Ramachandran plot

	3.Crystal packing.

A visual check of each entry has been made using MidasPlus (Computer Graphics
Laboratory, University of California, San Francisco). 

In the future, submitted coordinate data sets will be made available through
pre-release immediately after the above checks have been made and once
depositors have given their approval to release the entry. 


__________________
	Protein Data Bank File Server and Anonymous FTP

The PDB has an e-mail file server available for your use. This server provides
PDB general information and documentation files. For more information, send an
e-mail message to fileserv@pb1.pdb.bnl.gov and include the following text:

	send info your_e-mail_address.

The PDB has an anonymous FTP account available on the system pdb.pdb.bnl.gov
with Internet address 130.199.144.1. It is possible to transfer files to and
from this system using anonymous as the FTP user name and your real user name
as the password. PDB general information and documentation files, as well as
pre-release atomic coordinate entries, are available for downloading. You also
can upload any files that you may wish to send to the PDB. Those using VMS may
need to place quotes around file names. 

Anyone experiencing problems or having questions related to the above network
services is requested to send an e-mail message to skora@bnl.gov. 


________________________________________________________________
                                 |
enrique e. abola                 |   BITNET:    abola@bnlchm 
Protein Data Bank                |   INTERNET:  abola@pb3.chm.bnl.gov
Department of Chemistry          |   (516)-282-4383
Brookhaven National Laboratory   |
Upton NY 11973                   |
________________________________________________________________