Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5465
Number of amino acids:222
Molecular Weight:26213.19 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)94.05%
Cysteine CYS (C)94.05%
Glutamic Acid GLU (E)135.86%
Aspartic Acid ASP (D)125.41%
Glycine GLY (G)94.05%
Phynylalanine PHE (F)167.21%
Isoleucine ILE (I)146.31%
Histidine HIS (H)73.15%
Lysine LYS (K)177.66%
Methionine MET (M)41.8%
Leucine LEU (L)2310.36%
Asparagine ASN (N)146.31%
Glutamine GLN (Q)73.15%
Proline PRO (P)83.6%
Serine SER (S)104.5%
Arginine ARG (R)156.76%
Threonine THR (T)177.66%
Tryptophan TRP (W)41.8%
Valine VAL (V)62.7%
Tyrosine TYR (Y)83.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1180
HydrogenH1821
NitrogenN323
OxygenO329
SulphurS13

FormulaC1180H1821N323O329S13
Total Number of Atoms:3666


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34420
Absorption 0.1% (=1 g/l)    1.313,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.294,   assuming all CYS residues are reduced
Aromaticity:0.126

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.98, 18.47, 22.07]

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:76.892
Grand average of hydropathicity (GRAVY):-0.45