Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3226
Number of amino acids:27
Molecular Weight:2922.3 Da
Theoretical pI:4.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)27.41%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)311.11%
Aspartic Acid ASP (D)27.41%
Glycine GLY (G)414.81%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)311.11%
Histidine HIS (H)00%
Lysine LYS (K)13.7%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)27.41%
Glutamine GLN (Q)27.41%
Proline PRO (P)13.7%
Serine SER (S)27.41%
Arginine ARG (R)13.7%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)13.7%
Tyrosine TYR (Y)27.41%


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):2
Total number of negatively charged residues (ASP + GLU):5
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    2980
Absorption 0.1% (=1 g/l)    1.020
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 33.33, 18.52]

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:61.4814
Grand average of hydropathicity (GRAVY):0.00