Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1161
Number of amino acids:225
Molecular Weight:23934.75 Da
Theoretical pI:4.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.89%
Cysteine CYS (C)177.56%
Glutamic Acid GLU (E)62.67%
Aspartic Acid ASP (D)125.33%
Glycine GLY (G)229.78%
Phynylalanine PHE (F)167.11%
Isoleucine ILE (I)62.67%
Histidine HIS (H)10.44%
Lysine LYS (K)62.67%
Methionine MET (M)31.33%
Leucine LEU (L)146.22%
Asparagine ASN (N)177.56%
Glutamine GLN (Q)62.67%
Proline PRO (P)135.78%
Serine SER (S)177.56%
Arginine ARG (R)52.22%
Threonine THR (T)2310.22%
Tryptophan TRP (W)31.33%
Valine VAL (V)104.44%
Tyrosine TYR (Y)83.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1045
HydrogenH1564
NitrogenN274
OxygenO333
SulphurS20

FormulaC1045H1564N274O333S20
Total Number of Atoms:3236


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.229,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.187,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.33, 30.67, 19.11]

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:56.4444
Grand average of hydropathicity (GRAVY):-0.06