# ANALYSIS OF CROSS-BRIDGE MECHANICS

> **NIH NIH R01** · WASHINGTON STATE UNIVERSITY · 1989 · $77,753

## Abstract

One long range goal in the study of muscle contraction is to
explain the physiological responses of muscle fibers in terms of
the kinetics and energetics of the actomyosin interaction.  The
proposed work will approach this goal by measuring the mechanics
of contraction of single, permeable, skeletal muscle fibers under
a variety of conditions.  These data will be used to refine
mathematical models of the complex kinetics and energetics of the
contractile interaction.  The proposed studies are a continuation
of an extensive series of experiments carried out over the last 6
years.  Previous work has characterized the effect of ligands on
the shortening of fast skeletal fibers, and an extension of this
approach to slow muscle and to lengthening of both fast and slow
fibers will produce new data defining the interaction of MgATP and
other ligands with the contractile proteins.  Additional
correlations linking muscle physiology to the more well known
biochemistry of the acto-S1 interaction will be determined by
comparing the response of active fibers and the kinetics of the
acto-S1 interaction using a series of different nucleotides
modified at either the base of ribose ring.  Using recently
developed methods that allow studies of fibers at higher
temperatures, previous studies performed at 10 degree C will also
be extended to more to physiological temperatures where preliminary
results show that the response of the fibers to alterations in
MgATP or pH may be quite different from those found at the lower
temperature.  Together the data obtained in eh above studies will
lead to a more detailed understanding of the energetics of the
cross-ridge states involved in substrate binding or in product
release.  This may in turn lead to more rational therapies for the
control of contraction in the treatment of cardiovascular
disorders.

## Key facts

- **NIH application ID:** 3159840
- **Project number:** 1R01AR039643-01
- **Recipient organization:** WASHINGTON STATE UNIVERSITY
- **SAM.gov UEI:** XRJSGX384TD6
- **Principal Investigator:** EDWARD F PATE
- **Activity code:** R01 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 1989
- **Award amount:** $77,753
- **Award type:** 1
- **Project period:** 1989-08-16 → 1994-07-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/3159840

## Citation

> US National Institutes of Health, RePORTER application 3159840, ANALYSIS OF CROSS-BRIDGE MECHANICS (1R01AR039643-01). Retrieved via MORVS 2026-10-24 from https://api.morvs.ai/grant/nih/3159840. Licensed CC0.

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