florfal ellishiah udolphe

[Rosalie Checca]

Hi,
Please, I'm facing the same error here and I've tried the step that you've mentioned but is no working for me, do you have any other idea about how can I solve it?
If I try to use Unfold, Layout and Optimize the issue appear.
I've formated my computer and it worked for a while, but after some time this issue continues to appear.
Thanks

same problem with unfold3D. i noticed a thing. i have 2 pc , one with Intel CPU i7 6950K and one with AMD Ryzen 3900X . on the i7 i have no problems with unfold 3D and it works perfectly, meanwhile on AMD it not works. i tryed to turn it off and on on plugin manager and nothing happened. i tryed also to uninstall and reinstall Maya and same... unfold 3D doesn't work.

When I want to unfold my UVs I get this error "Unfold 3d Process Error". I saw that Autodesk acknowledged this as an issue due to limitation with AMD CPUs (I have a Ryzen 3800X). They propose to disable the processor's SMT in the Bios, which I did, but it didn't work.
Now, I want to use the legacy unwrapping algorithm, as they propose it as well. However I don't know how to enable it. I believe it is something you select in the Unfold settings, but I don't have any way to do so.

So how do you enable it, and do you know if there is any thing to help with this amd problem ?
Thank you

Hi
Thank you, that was it. I just was in the Unfold UV Tool (the brush one), not the base Unfold UVs.
The results are different than with the Unfold3D tho, but I'll be able to work with it
Thank you again

Just solved the problem. One important thing I've noticed is you have to update your Maya 2020 first. And this doesn't mean that you have to update the software to the latest version like 2023, just update it to the latest version of 2020 will work. After update, you can then edit the maya.ev. I've been failed sooooooo many times until I updated maya software. This is the video shows where to find the update maya file: =5Liiw7qdIxU

Protein folding is the physical process by which a protein, after synthesis by a ribosome as a linear chain of amino acids, changes from an unstable random coil into a more ordered three-dimensional structure. This structure permits the protein to become biologically functional.[1]

The folding of many proteins begins even during the translation of the polypeptide chain. The amino acids interact with each other to produce a well-defined three-dimensional structure, known as the protein's native state. This structure is determined by the amino-acid sequence or primary structure.[2]

The correct three-dimensional structure is essential to function, although some parts of functional proteins may remain unfolded,[3] indicating that protein dynamics are important. Failure to fold into a native structure generally produces inactive proteins, but in some instances, misfolded proteins have modified or toxic functionality. Several neurodegenerative and other diseases are believed to result from the accumulation of amyloid fibrils formed by misfolded proteins, the infectious varieties of which are known as prions.[4] Many allergies are caused by the incorrect folding of some proteins because the immune system does not produce the antibodies for certain protein structures.[5]

Denaturation of proteins is a process of transition from a folded to an unfolded state. It happens in cooking, burns, proteinopathies, and other contexts. Residual structure present, if any, in the supposedly unfolded state may form a folding initiation site and guide the subsequent folding reactions. [6]

The duration of the folding process varies dramatically depending on the protein of interest. When studied outside the cell, the slowest folding proteins require many minutes or hours to fold, primarily due to proline isomerization, and must pass through a number of intermediate states, like checkpoints, before the process is complete.[7] On the other hand, very small single-domain proteins with lengths of up to a hundred amino acids typically fold in a single step.[8] Time scales of milliseconds are the norm, and the fastest known protein folding reactions are complete within a few microseconds.[9] The folding time scale of a protein depends on its size, contact order, and circuit topology.[10]

The primary structure of a protein, its linear amino-acid sequence, determines its native conformation.[11] The specific amino acid residues and their position in the polypeptide chain are the determining factors for which portions of the protein fold closely together and form its three-dimensional conformation. The amino acid composition is not as important as the sequence.[12] The essential fact of folding, however, remains that the amino acid sequence of each protein contains the information that specifies both the native structure and the pathway to attain that state. This is not to say that nearly identical amino acid sequences always fold similarly.[13] Conformations differ based on environmental factors as well; similar proteins fold differently based on where they are found.

Formation of a Protein secondary structuresecondary structure is the first step in the folding process that a protein takes to assume its native structure. Characteristic of secondary structure are the structures known as alpha helices and beta sheets that fold rapidly because they are stabilized by intramolecular hydrogen bonds, as was first characterized by Linus Pauling. Formation of intramolecular hydrogen bonds provides another important contribution to protein stability.[14] α-helices are formed by hydrogen bonding of the backbone to form a spiral shape (refer to figure on the right).[12] The β pleated sheet is a structure that forms with the backbone bending over itself to form the hydrogen bonds (as displayed in the figure to the left). The hydrogen bonds are between the amide hydrogen and carbonyl oxygen of the peptide bond. There exists anti-parallel β pleated sheets and parallel β pleated sheets where the stability of the hydrogen bonds is stronger in the anti-parallel β sheet as it hydrogen bonds with the ideal 180 degree angle compared to the slanted hydrogen bonds formed by parallel sheets.[12]

The α-Helices and β-Sheets are commonly amphipathic, meaning they have a hydrophilic and a hydrophobic portion. This ability helps in forming tertiary structure of a protein in which folding occurs so that the hydrophilic sides are facing the aqueous environment surrounding the protein and the hydrophobic sides are facing the hydrophobic core of the protein.[15] Secondary structure hierarchically gives way to tertiary structure formation. Once the protein's tertiary structure is formed and stabilized by the hydrophobic interactions, there may also be covalent bonding in the form of disulfide bridges formed between two cysteine residues. These non-covalent and covalent contacts take a specific topological arrangement in a native structure of a protein. Tertiary structure of a protein involves a single polypeptide chain; however, additional interactions of folded polypeptide chains give rise to quaternary structure formation.[16]

Tertiary structure may give way to the formation of quaternary structure in some proteins, which usually involves the "assembly" or "coassembly" of subunits that have already folded; in other words, multiple polypeptide chains could interact to form a fully functional quaternary protein.[12]

Folding is a spontaneous process that is mainly guided by hydrophobic interactions, formation of intramolecular hydrogen bonds, van der Waals forces, and it is opposed by conformational entropy.[17] The process of folding often begins co-translationally, so that the N-terminus of the protein begins to fold while the C-terminal portion of the protein is still being synthesized by the ribosome; however, a protein molecule may fold spontaneously during or after biosynthesis.[18] While these macromolecules may be regarded as "folding themselves", the process also depends on the solvent (water or lipid bilayer),[19] the concentration of salts, the pH, the temperature, the possible presence of cofactors and of molecular chaperones.

Proteins will have limitations on their folding abilities by the restricted bending angles or conformations that are possible. These allowable angles of protein folding are described with a two-dimensional plot known as the Ramachandran plot, depicted with psi and phi angles of allowable rotation.[20]

Protein folding must be thermodynamically favorable within a cell in order for it to be a spontaneous reaction. Since it is known that protein folding is a spontaneous reaction, then it must assume a negative Gibbs free energy value. Gibbs free energy in protein folding is directly related to enthalpy and entropy.[12] For a negative delta G to arise and for protein folding to become thermodynamically favorable, then either enthalpy, entropy, or both terms must be favorable.

Minimizing the number of hydrophobic side-chains exposed to water is an important driving force behind the folding process.[21] The hydrophobic effect is the phenomenon in which the hydrophobic chains of a protein collapse into the core of the protein (away from the hydrophilic environment).[12] In an aqueous environment, the water molecules tend to aggregate around the hydrophobic regions or side chains of the protein, creating water shells of ordered water molecules.[22] An ordering of water molecules around a hydrophobic region increases order in a system and therefore contributes a negative change in entropy (less entropy in the system). The water molecules are fixed in these water cages which drives the hydrophobic collapse, or the inward folding of the hydrophobic groups. The hydrophobic collapse introduces entropy back to the system via the breaking of the water cages which frees the ordered water molecules.[12] The multitude of hydrophobic groups interacting within the core of the globular folded protein contributes a significant amount to protein stability after folding, because of the vastly accumulated van der Waals forces (specifically London Dispersion forces).[12] The hydrophobic effect exists as a driving force in thermodynamics only if there is the presence of an aqueous medium with an amphiphilic molecule containing a large hydrophobic region.[23] The strength of hydrogen bonds depends on their environment; thus, H-bonds enveloped in a hydrophobic core contribute more than H-bonds exposed to the aqueous environment to the stability of the native state.[24]

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