Physicochemical Properties of Peptide



PPepDB ID:PPepDB_986
Number of amino acids:225
Molecular Weight:23597.77 Da
Theoretical pI:7.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2310.22%
Cysteine CYS (C)167.11%
Glutamic Acid GLU (E)52.22%
Aspartic Acid ASP (D)125.33%
Glycine GLY (G)2912.89%
Phynylalanine PHE (F)104.44%
Isoleucine ILE (I)62.67%
Histidine HIS (H)20.89%
Lysine LYS (K)83.56%
Methionine MET (M)31.33%
Leucine LEU (L)146.22%
Asparagine ASN (N)83.56%
Glutamine GLN (Q)83.56%
Proline PRO (P)146.22%
Serine SER (S)114.89%
Arginine ARG (R)114.89%
Threonine THR (T)219.33%
Tryptophan TRP (W)31.33%
Valine VAL (V)146.22%
Tyrosine TYR (Y)73.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1024
HydrogenH1589
NitrogenN289
OxygenO315
SulphurS19

FormulaC1024H1589N289O315S19
Total Number of Atoms:3236


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.184,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.141,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.00, 27.56, 20.00]

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:62.9333
Grand average of hydropathicity (GRAVY):-0.08