Physicochemical Properties of Peptide



PPepDB ID:PPepDB_617
Number of amino acids:43
Molecular Weight:4312.13 Da
Theoretical pI:7.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)613.95%
Cysteine CYS (C)49.3%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)49.3%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.33%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)12.33%
Leucine LEU (L)511.63%
Asparagine ASN (N)613.95%
Glutamine GLN (Q)12.33%
Proline PRO (P)24.65%
Serine SER (S)24.65%
Arginine ARG (R)12.33%
Threonine THR (T)613.95%
Tryptophan TRP (W)00%
Valine VAL (V)24.65%
Tyrosine TYR (Y)12.33%


Atomic Composition:


As there is at least one ambiguous position (B, J, X or Z) in the sequence considered, the atomic composition cannot be computed.


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1740
Absorption 0.1% (=1 g/l)    0.404,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.346,   assuming all CYS residues are reduced
Aromaticity:0.023

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.93, 32.56, 27.91]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:81.8604
Grand average of hydropathicity (GRAVY):0.00