Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4848
Number of amino acids:227
Molecular Weight:24920.95 Da
Theoretical pI:9.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.05%
Cysteine CYS (C)31.32%
Glutamic Acid GLU (E)41.76%
Aspartic Acid ASP (D)104.41%
Glycine GLY (G)167.05%
Phynylalanine PHE (F)187.93%
Isoleucine ILE (I)114.85%
Histidine HIS (H)41.76%
Lysine LYS (K)104.41%
Methionine MET (M)31.32%
Leucine LEU (L)2511.01%
Asparagine ASN (N)177.49%
Glutamine GLN (Q)93.96%
Proline PRO (P)135.73%
Serine SER (S)135.73%
Arginine ARG (R)125.29%
Threonine THR (T)135.73%
Tryptophan TRP (W)10.44%
Valine VAL (V)2611.45%
Tyrosine TYR (Y)31.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1135
HydrogenH1792
NitrogenN308
OxygenO311
SulphurS6

FormulaC1135H1792N308O311S6
Total Number of Atoms:3552


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10095
Absorption 0.1% (=1 g/l)    0.405,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.400,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.00, 25.99, 21.15]

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:102.114
Grand average of hydropathicity (GRAVY):0.21