Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5416
Number of amino acids:345
Molecular Weight:38796.35 Da
Theoretical pI:8.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)154.35%
Cysteine CYS (C)102.9%
Glutamic Acid GLU (E)236.67%
Aspartic Acid ASP (D)92.61%
Glycine GLY (G)236.67%
Phynylalanine PHE (F)174.93%
Isoleucine ILE (I)185.22%
Histidine HIS (H)113.19%
Lysine LYS (K)92.61%
Methionine MET (M)82.32%
Leucine LEU (L)3510.14%
Asparagine ASN (N)113.19%
Glutamine GLN (Q)185.22%
Proline PRO (P)154.35%
Serine SER (S)4111.88%
Arginine ARG (R)277.83%
Threonine THR (T)174.93%
Tryptophan TRP (W)41.16%
Valine VAL (V)267.54%
Tyrosine TYR (Y)82.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1711
HydrogenH2704
NitrogenN490
OxygenO505
SulphurS18

FormulaC1711H2704N490O505S18
Total Number of Atoms:5428


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34545
Absorption 0.1% (=1 g/l)    0.890,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    0.874,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 61.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.30, 26.09, 23.48]

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:86.1158
Grand average of hydropathicity (GRAVY):-0.17